CN101871338A - Direct drive pumping unit - Google Patents
Direct drive pumping unit Download PDFInfo
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- CN101871338A CN101871338A CN 201010210254 CN201010210254A CN101871338A CN 101871338 A CN101871338 A CN 101871338A CN 201010210254 CN201010210254 CN 201010210254 CN 201010210254 A CN201010210254 A CN 201010210254A CN 101871338 A CN101871338 A CN 101871338A
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- wire rope
- permanent magnet
- magnet motor
- pumping unit
- direct drive
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Abstract
The invention discloses a direct drive pumping unit, which comprises a derrick (1), a controller (2), a wire rope pulley (7), a permanent magnet motor (8), a front guide pulley (9), and a rear guide pulley (5). The controller (2) and the permanent magnet motor (8) form a variable frequency drive system so as to drive the pumping unit; the permanent magnet motor (8) is arranged on a chassis of the derrick (1) or on the ground; the wire rope pulley (7) and the permanent magnet motor (8) are connected and rotate synchronously; a wire rope is fixedly wound on the wire rope pulley (7); and an oil-well pump pull rod and a balance block (4) are respectively suspended on the end parts of the rope body on two sides of the fixed part of the wire rope through the front guide pulley (9) and the rear guide pulley (5). The direct drive pumping unit has the advantages of higher transmission efficiency, simpler structure, less friction links, and more convenient regulation and control of stroke and stroke frequency.
Description
Technical field
The present invention relates to oil-field oil pumper tool field, particularly relate to a kind of direct drive pumping unit that directly drives by controlled frequency changing driving system.
Background technology
Current known oil pumper is a beam pumping unit, and through belt transmission, gearbox slows down by motor for it, by quadric chain and horse head rotatablely moving of motor is become rectilinear motion up and down again, to drive the oil pumping that moves up and down of oil pumper pull bar.Beam pumping unit is reliable, be easy to safeguard, use extensively, but processing through multiple mechanical deceleration device and motion mode mapped structure, motor could be become the rectilinear motion of low jig frequency than rotatablely moving of higher speed, the drive system structure complexity, transmission efficiency is low, cost is higher, stroke and jig frequency are regulated inconvenient.
Although also the someone has studied the oil pumper that adopts permanent magnet motor at present, often structure is comparatively complicated for it, and transmission efficiency is low, and the friction link is many, and mechanical loss is big, and is energy-conservation inadequately, and the cost height is transferred ginseng inconvenience.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is the above-mentioned shortcoming that overcomes existing oil pumper, provide that a kind of transmission system efficiency is higher, structure is simpler, the friction link still less, stroke and jig frequency regulate and control direct drive pumping unit more easily.
(2) technical scheme
For solving the problems of the technologies described above, a kind of direct drive pumping unit is provided, it comprises derrick, controller, wire rope pulley, permanent magnet motor, front jockey wheel and back directive wheel, described controller and permanent magnet motor are formed frequency changing driving system to drive oil pumper, described permanent magnet motor places on the chassis of derrick or on the ground, described wire rope pulley is connected with described permanent magnet motor and rotation synchronously, be wound with wire rope on the described wire rope pulley, one end of described wire rope is walked around described front jockey wheel and is hung the oil well pump pull bar, and the other end is walked around described back directive wheel hanging balancing piece.
Preferably, described controller is controlled described permanent magnet motor and is made described wire rope pulley rotate clockwise or counterclockwise to drive the oil pumping that moves upward of described oil well pump pull bar.
Preferably, the inside of described permanent magnet motor is provided with position sensor, is used for sending position signalling to described controller when the site is with following site in oil well pump arrival setting, and described controller is controlled the stroke of described oil pumper according to described position signalling.
Preferably, directive wheel in the middle of being provided with between described wire rope pulley and the described back directive wheel, walk around described back directive wheel after described wire rope one end leads via directive wheel in the middle of described again, the wire rope between described wire rope pulley and described front jockey wheel and described wire rope pulley and the middle directive wheel that is arranged so that of described middle directive wheel is on the same horizontal plane.
Preferably, the shaft extension of described permanent magnet motor is connected by shaft coupling and rotation synchronously with described wire rope pulley.
Preferably, described permanent magnet motor is the permanent magnetism inner rotor motor.
Preferably, on the external diameter of described wire rope pulley, brake is housed.
Preferably, described wire rope is made up of two wire rope, and described two wire rope respectively have an end to be fixed on the described wire rope pulley.
Preferably, described position sensor is a contactless position sensor.
Preferably, described controller makes described permanent magnet motor change direction of rotation to realize the upper and lower motion oil pumping process of oil well pump by the three-phase current of exporting different phase sequences.
Described controller makes described permanent magnet motor change rotary speed to realize the jig frequency adjusting of oil pumper by the three-phase electricity of output different frequency and voltage.
(3) beneficial effect
Because the magnetic field in the permanent magnet motor is to be produced by permanent-magnet steel, does not need to consume exciting power, has saved and produced the required energy in magnetic field; Do not adopt belt transmission and machineries such as reducer, quadric chain in the transmission system, thereby transmission system efficiency is higher, the structure of transmission system is more simplified; The oil pumping machine oil pumping process control can be finished automatically, and the adjusting of stroke, jig frequency changes its parameter setting by controller to be finished, and regulates easy; The volume of whole oil pumper reduces, and quality alleviates, and cost reduces; Permanent magnet motor and wire rope pulley place ground, have alleviated the derrick load, and safeguard more convenient.
Description of drawings
Fig. 1 is the structural representation according to the direct drive pumping unit of the preferred embodiment of the present invention;
Fig. 2 is according to the permanent magnet motor of the direct drive pumping unit of the preferred embodiment of the present invention and wire rope pulley structure sectional view.
Wherein, 1: derrick; 2: controller; 3: middle directive wheel; 4: balance weight; 5: the back directive wheel; 6: brake; 7: wire rope pulley; 8: permanent magnet motor; 9: front jockey wheel; 10: fixing card; 11: production wellhead; 12: cable sheave bracket; 13: shaft coupling; 14: magnet steel; 15: stator; 16: rotor; 17: the permanent magnet motor shell; 18: position sensor.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
As shown in Figure 1, direct drive pumping unit of the present invention comprises derrick 1, controller 2, wire rope pulley 7, permanent magnet motor 8, front jockey wheel 9 and back directive wheel 5, described controller 2 and permanent magnet motor 8 are formed frequency changing driving system to drive oil pumper, described permanent magnet motor 8 places on the chassis of derrick 1 or on the ground, described wire rope pulley 7 is connected with described permanent magnet motor 8 and rotation synchronously, the wire rope that has been fastened on the described wire rope pulley 7, described wire rope are fixed the rope status of part both sides not via front jockey wheel 9 and back directive wheel 5, its end hangs oil well pump pull bar and balance weight 4 respectively.The described permanent magnet motor 8 of described controller 2 controls makes described wire rope pulley 7 rotate clockwise or counterclockwise by wire rope and drives the oil pumping that moves upward of described oil well pump pull bar; At this moment, described balance weight 4 moves downward.
Wherein, derrick 1 is to be welded with shaped steel, derrick 1 is fastened on the ground, be equipped with on the derrick 1 carbon steel material through front jockey wheel that machining forms 9 and after directive wheel 5, directive wheel 3 in the middle of preferably also installing, preferred back directive wheel is installed in the top of derrick 1, in preferred every directive wheel the ball bearing of reducing friction is installed, the part of the rope body of wire rope is fixed on the wire rope pulley 7, the steel cord ends of oil pumping pump side is connected with the oil well pump pull bar by fixing card 10, oil pumping pump side rope body is wrapped on the wire rope pulley 7 through behind the front jockey wheel 9, the steel cord ends of balance weight side is connected with balance weight 4, the rope body warp of balance weight side is directive wheel 5 later, preferably also is wrapped on the wire rope pulley 7 through middle directive wheel 3.Preferably, described in the middle of directive wheel 3 make described wire rope be on the same horizontal plane in the forward and backward side of described wire rope pulley 7, thereby the power of the suffered forward and backward side of wire rope pulley 7 can partly cancel out each other, improved the force-bearing situation of wire rope pulley 7.The winding method of wire rope is: when direction was rotated, the oil well pump pull bar moved upward when wire rope pulley clockwise (or counterclockwise), and balance weight 4 moves downward.
Wherein, permanent magnet motor 8 is made by machining and electric machining, with the lower margin screw on the chassis of derrick 1 or on the ground, wire rope pulley 7 is made for machining, cable sheave bracket 12 supportings that two ends respectively have a carbon steel welding and machining to make, a ball bearing is housed in each cable sheave bracket 12, to reduce friction loss, cable sheave bracket 12 is fixed on the chassis of derrick 1 or on the ground, the shaft extension of permanent magnet motor 8 is consistent with the axial line of wire rope pulley 7 during installation, preferably adopts shaft coupling 13 that the two is coupled together run-in synchronism.
Preferably, described permanent magnet motor 8 is the permanent magnetism inner rotor motor.The permanent-magnetic outer rotor motor is often done wire rope pulley with motor casing, because the outer rotor diameter of permanent magnet motor is big, under stroke that satisfies oil pumper and jig frequency condition, the rotating speed of permanent-magnetic outer rotor motor is low, thereby the volume of permanent-magnetic outer rotor motor is big, and consumptive material is many, the cost height, stressed complexity is damaged easily.And the price of permanent magnet motor is the major part of oil pumper price, under same jig frequency and stroke situation, the speed of permanent magnetism inner rotor motor doubles at least, because the diameter of wire rope pulley is than extremely when young 2 times of outer rotor diameters, so the cost of permanent magnetism inner rotor motor will be at half than permanent-magnetic outer rotor motor cost.Thereby, adopt the permanent magnetism inner rotor motor, further reduced cost.
Preferably, directive wheel 3 in the middle of being provided with between described wire rope pulley 7 and the described back directive wheel 5, described wire rope twines described wire rope pulley 7 after by hanging described balance weight 4 via described back directive wheel 5 guiding in its end again after 3 guiding of directive wheel in the middle of described, described middle directive wheel 3 makes described wire rope be on the same horizontal plane in the forward and backward side of described wire rope pulley 7.Preferably, brake 6 is housed on the external diameter of described wire rope pulley 7, is convenient to oil pumper in maintenance and use in emergency circumstances, to guarantee described oil pumper safety.Preferably, described wire rope is made up of two wire rope, and described two wire rope respectively have an end to be fixed on the described wire rope pulley 7, the convenient adjusting and replacing.
The inside of described permanent magnet motor 8 is provided with position sensor 18, and described position sensor 18 is a contactless position sensor.The oil pumper stroke is to be controlled by the position signalling that the contactless position sensor that is installed in the permanent magnet motor 8 produces, the position signalling that described contactless position sensor is sent when described controller 2 last site that arrival is set according to oil well pump and following site, the stroke of control oil pumper.The position signalling that adopts contactless position sensor to produce is controlled, it is the position that sets in advance to determine to go up site and following site according to controller, thereby contactless position sensor sends position signalling when arriving the precalculated position, than more advanced, reliable with the travel switch control that the contact is arranged.
The adjusting of oil pumper jig frequency is to control by the setting value that changes control signal, and described controller 2 changes magnitude of voltage and the frequency values of powering for described permanent magnet motor 8 and controls the oil pumper jig frequency according to new setting value.When described controller 2 improved the magnitude of voltage of giving described permanent magnet motor 8 power supplies and frequency values, the rotating speed of described permanent magnet motor 8 improved, and the oil pumper jig frequency improves thereupon; When described controller 2 reduced the magnitude of voltage of giving described permanent magnet motor 8 power supplies and frequency values, the rotating speed of described permanent magnet motor 8 reduced, and the oil pumper jig frequency decreases, and with this kind way control oil pumper jig frequency, method is easy, reliable, accurate.
Controller 2 is preferably mounted in the derrick, and controller 2 is pressed the technical need of specific jig frequency of oil pumper and stroke, sets voltage, frequency and the phase sequence of supplying with permanent magnet motor.Give permanent magnet motor 8 according to positive phase sequence U when controller 2, V is when W powers, permanent magnet motor 8 drives wire rope pulley 7 clockwise directions (or counterclockwise) rotation, the oil well pump pull bar moves upward oil pumping to ground, and balance weight 4 moves downward the release potential energy simultaneously, helps permanent magnet motor 8 oil pumping; When oil well pump reaches in the oil pumping of setting the site, position sensor 18 in the permanent magnet motor 8 sends position signalling to controller 2, the power supply phase sequence that controller 2 changes in view of the above to permanent magnet motor 8 is U, W, V, permanent magnet motor 8 turns to and changes into counterclockwise (or clockwise) direction rotation at this moment, and this moment, oil well pump moved downward oil suction, and permanent magnet motor 8 drags balance weight 4 rising savings potential energies; When oil well pump reaches under the oil pumping of setting the site, the position signalling that position sensors 18 when controller 2 descends the site according to this in permanent magnet motor 8 send, the power supply phase sequence that changes to permanent magnet motor 8 is U, V, W, permanent magnet motor 8 turned to and changed into clockwise (or counterclockwise) direction rotation this moment, repeated oil pumping.Operation so repeatedly, the oil with underground storage is evacuated to ground continuously.Described position sensor 18 is preferably contactless position sensor.The effect of described balance weight 4 makes the load of described permanent magnet motor 8 balanced more, improved the load characteristic of described permanent magnet motor 8, reduced the overload capacity requirement of oil pumper, helped to reduce volume, quality and the cost of described permanent magnet motor 8 described permanent magnet motor 8.
The present invention can regulate the jig frequency and the stroke of oil pumper easily, the process of regulating the oil pumper jig frequency is: change controller 2 and set for the frequency of permanent magnet motor 8 power supplies and voltage, when controller 2 improves the frequency of supply of giving permanent magnet motor 8 and voltage, permanent magnet motor 8 speeds of service are accelerated, thereby oil well pump shortens to following time interval in site in last site, causes the oil pumper jig frequency to improve; When the setting that changes controller 2, reduce frequency of supply and the voltage of supplying with permanent magnet motor 8, permanent magnet motor 8 speeds of service slow down, thereby oil well pump prolongs to time interval in site down in last site, cause the reduction of oil pumper jig frequency.
The process that the oil pumper stroke is heightened is: change the setting of position signalling, prolong the time set that controller 2 switches for the power supply phase sequence of permanent magnet motor 8, permanent magnet motor 8 prolongs at interval in the same phase sequence supplying time of controller, this moment, the speed of permanent magnet motor 8 did not change, thereby had heightened the stroke of oil pumper; In like manner, the time set that reduction controller 2 switches for the power supply phase sequence of permanent magnet motor 8, permanent magnet motor 8 shortens at interval in the same phase sequence supplying time of controller, and the speed of permanent magnet motor 8 does not change, thereby has reduced the stroke of oil pumper.
The solution of the present invention is about to rotatablely moving of motor by simple structure and changes moving up and down of oil well pump and balance weight into, has only adopted a wire rope pulley and several directive wheel, and frictional dissipation is few, saves energy, reduces cost.Permanent magnet motor is placed on the chassis of derrick or on the ground, alleviates derrick weight, save the derrick steel, and convenient maintenance and safeguarding.Adopt wire rope pulley, require wire rope pulley is designed according to the moment of torsion that transmits permanent magnet motor and the strength and stiffness of the tractive force that wire rope transmits, its external diameter is less usually, therefore permanent magnet motor has high rotational speed under the condition that satisfies same stroke of oil pumper and jig frequency, cause the volume of permanent magnet motor can be littler, material usage is lower, and the motor cost is lower.Motor and wire rope pulley split are made, motor rotor driven in synchronism wire rope pulley, and both separation are easier, more convenient replacing consumable accessory, wire rope pulley are inexpensive consumable accessorys, after having grown service time, wire rope pulley damages replacing and need not to change motor, has reduced cost.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (11)
1. direct drive pumping unit, it is characterized in that, described direct drive pumping unit comprises derrick (1), controller (2), wire rope pulley (7), permanent magnet motor (8), front jockey wheel (9) and back directive wheel (5), described controller (2) and permanent magnet motor (8) are formed frequency changing driving system to drive oil pumper, described permanent magnet motor (8) places on the chassis of derrick (1) or on the ground, described wire rope pulley (7) is connected with described permanent magnet motor (8) and rotation synchronously, described wire rope pulley is wound with wire rope on (7), one end of described wire rope is walked around described front jockey wheel (9) and is hung the oil well pump pull bar, and the other end is walked around described back directive wheel (5) hanging balancing piece (4).
2. direct drive pumping unit as claimed in claim 1 is characterized in that, described controller (2) is controlled described permanent magnet motor (8) and made described wire rope pulley (7) rotate clockwise or counterclockwise to drive the oil pumping that moves upward of described oil well pump pull bar.
3. direct drive pumping unit as claimed in claim 1, it is characterized in that, the inside of described permanent magnet motor (8) is provided with position sensor (18), be used for sending position signalling to described controller (2) when the site is with following site in oil well pump arrival setting, described controller (2) is controlled the stroke of described oil pumper according to described position signalling.
4. direct drive pumping unit as claimed in claim 1, it is characterized in that, directive wheel (3) in the middle of being provided with between described wire rope pulley (7) and the described back directive wheel (5), described wire rope one end is via walking around described back directive wheel (5) again after directive wheel (3) leads in the middle of described, the wire rope between described wire rope pulley (7) and described front jockey wheel (9) and described wire rope pulley (7) and the middle directive wheel (3) that is arranged so that of described middle directive wheel (3) is on the same horizontal plane.
5. as each described direct drive pumping unit among the claim 1-4, it is characterized in that the shaft extension of described permanent magnet motor (8) is connected by shaft coupling (13) with described wire rope pulley (7).
6. as each described direct drive pumping unit among the claim 1-4, it is characterized in that described permanent magnet motor (8) is the permanent magnetism inner rotor motor.
7. as each described direct drive pumping unit among the claim 1-4, it is characterized in that, brake (6) is housed on the external diameter of described wire rope pulley (7).
8. as each described direct drive pumping unit among the claim 1-4, it is characterized in that described wire rope is made up of two wire rope, described two wire rope respectively have an end to be fixed on the described wire rope pulley (7).
9. direct drive pumping unit as claimed in claim 3 is characterized in that, described position sensor (18) is a contactless position sensor.
10. as each described direct drive pumping unit among the claim 1-4, it is characterized in that described controller (2) makes described permanent magnet motor (8) change direction of rotation to realize the upper and lower motion oil pumping process of oil well pump by the three-phase current of exporting different phase sequences.
11., it is characterized in that described controller (2) makes described permanent magnet motor (8) change rotary speed to realize the jig frequency adjusting of oil pumper by the three-phase electricity of output different frequency and voltage as each described direct drive pumping unit among the claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010210254 CN101871338A (en) | 2010-06-22 | 2010-06-22 | Direct drive pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010210254 CN101871338A (en) | 2010-06-22 | 2010-06-22 | Direct drive pumping unit |
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| Publication Number | Publication Date |
|---|---|
| CN101871338A true CN101871338A (en) | 2010-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010210254 Pending CN101871338A (en) | 2010-06-22 | 2010-06-22 | Direct drive pumping unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562002A (en) * | 2012-01-16 | 2012-07-11 | 西安交通大学 | Direct-drive pumping unit of permanent-magnet disk-type motor |
| CN105645288A (en) * | 2016-03-10 | 2016-06-08 | 胡勇 | Overhang winch type oil bailing device |
| CN112865409A (en) * | 2021-01-12 | 2021-05-28 | 大庆油田有限责任公司 | Permanent-magnet semi-direct-drive synchronous dragging device of direct-drive pumping unit |
| CN112865410A (en) * | 2021-01-12 | 2021-05-28 | 大庆油田有限责任公司 | Permanent magnet semi-direct-drive synchronous dragging device for pumping unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1097045A (en) * | 1993-06-30 | 1995-01-04 | 北京市西城区新开通用试验厂 | Numerically controlled beam-pumping unit with the production derrick coupling |
| CN1664305A (en) * | 2005-03-15 | 2005-09-07 | 沈阳工业大学 | Electronic, electrical and mechanical integrated dragging pumping unit |
| CN101070837A (en) * | 2007-03-19 | 2007-11-14 | 濮阳市信宇石油机械化工有限公司 | W-type towing oil-pumping machine |
| CN201306154Y (en) * | 2008-08-05 | 2009-09-09 | 郭有启 | Energy-efficient tower oil pumping unit |
| CN201696006U (en) * | 2010-06-22 | 2011-01-05 | 青岛朗进科技有限公司 | Directly driven beam pumping unit |
-
2010
- 2010-06-22 CN CN 201010210254 patent/CN101871338A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1097045A (en) * | 1993-06-30 | 1995-01-04 | 北京市西城区新开通用试验厂 | Numerically controlled beam-pumping unit with the production derrick coupling |
| CN1664305A (en) * | 2005-03-15 | 2005-09-07 | 沈阳工业大学 | Electronic, electrical and mechanical integrated dragging pumping unit |
| CN101070837A (en) * | 2007-03-19 | 2007-11-14 | 濮阳市信宇石油机械化工有限公司 | W-type towing oil-pumping machine |
| CN201306154Y (en) * | 2008-08-05 | 2009-09-09 | 郭有启 | Energy-efficient tower oil pumping unit |
| CN201696006U (en) * | 2010-06-22 | 2011-01-05 | 青岛朗进科技有限公司 | Directly driven beam pumping unit |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562002A (en) * | 2012-01-16 | 2012-07-11 | 西安交通大学 | Direct-drive pumping unit of permanent-magnet disk-type motor |
| CN102562002B (en) * | 2012-01-16 | 2015-01-07 | 西安交通大学 | Direct-drive pumping unit of permanent-magnet disk-type motor |
| CN105645288A (en) * | 2016-03-10 | 2016-06-08 | 胡勇 | Overhang winch type oil bailing device |
| CN105645288B (en) * | 2016-03-10 | 2017-09-22 | 胡勇 | Winch overhead oil bailing device |
| CN112865409A (en) * | 2021-01-12 | 2021-05-28 | 大庆油田有限责任公司 | Permanent-magnet semi-direct-drive synchronous dragging device of direct-drive pumping unit |
| CN112865410A (en) * | 2021-01-12 | 2021-05-28 | 大庆油田有限责任公司 | Permanent magnet semi-direct-drive synchronous dragging device for pumping unit |
| CN112865410B (en) * | 2021-01-12 | 2021-11-23 | 大庆油田有限责任公司 | Permanent magnet semi-direct-drive synchronous dragging device for pumping unit |
| CN112865409B (en) * | 2021-01-12 | 2021-11-30 | 大庆油田有限责任公司 | Permanent-magnet semi-direct-drive synchronous dragging device of direct-drive pumping unit |
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