CN202970641U - Tower-type oil pumping machine - Google Patents

Tower-type oil pumping machine Download PDF

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Publication number
CN202970641U
CN202970641U CN 201220620098 CN201220620098U CN202970641U CN 202970641 U CN202970641 U CN 202970641U CN 201220620098 CN201220620098 CN 201220620098 CN 201220620098 U CN201220620098 U CN 201220620098U CN 202970641 U CN202970641 U CN 202970641U
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guide wheel
traction sheave
oil pumping
pull rope
wheel
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马丙辉
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Zhejiang Xichuan Electrical Technology Co., Ltd.
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马丙辉
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Abstract

The utility model discloses a tower-type oil pumping machine, which comprises a tower, a tractor fixed on the tower, an oil pumping rod and a clump weight, wherein the tractor is connected with a traction sheave through a speed reducing mechanism; the traction sheave is respectively provided with traction ropes connected with the oil pumping rod and the clump weight; the traction rope on the traction sheave is connected with the oil pumping rod and the clump weight through a transmission mechanism; a guide wheel seat is arranged on the tower close to one side of the oil pumping rod; the guide wheel seat is in rotating connection with the tower, close to one end of the traction sheave; a rotation limit structure is arranged between the tower and the guide wheel seat; a guide wheel is arranged at the other end of the outer side of the guide wheel seat; and the traction ropes connected with the traction sheave and the oil pumping rod are connected with the oil pumping rod around the guide wheel. The tower-type oil pumping machine can be convenient for maintaining a well opening; and with the adoption of the tower-type oil pumping machine, the condition that the tractor does idle work in an ascending stroke can be avoided, the efficiency of the tractor can be effectively improved, the impact in reversing rotation can be eliminated, the service life of the oil pumping rod can be prolonged, and the safety performance is improved.

Description

A kind of tower shelf type oil pumping machine
Technical field
The utility model relates to a kind of oil exploration equipment, especially relates to a kind of oil pumper of tower-type.
Background technology
At present, in technical field of petroleum extraction, tower shelf type oil pumping machine is widely used, and its common structure is as follows: drive traction sheave after traction machine (motor) slows down by reducing gear and rotate, be arranged with pull rope on traction sheave, pull rope two ends difference connecting with pumping rod and balancing weight.The rotation of traction machine is slowed down to increase through reducing gear and is driven traction sheave after turning round and rotate, thereby the pull rope by winding on traction sheave drives sucker rod rises to complete oil pumping, balancing weight discharges the potential energy that stores and is used for the service hoisting sucker rod, to reduce the starting torque of traction machine, prescribe a time limit when sucker rod arrives on stroke, controlling organization is controlled the traction machine backward rotation, and this moment, sucker rod descended, balancing weight rises, and traction machine does work with storage of potential energy to balancing weight.Up and down like this do action, sucker rod are namely completed and are continued oil pumping.
For example, a kind of disclosed on Chinese patent literature " adopting the wheel type oil pumping unit of switched reluctance motor speed governing ", its notice of authorization number is CN201241670Y, formed by mandrel, driving wheel, lifting rope, counterweight lifting rope, counterweight, reducer, brake, motor etc., driving wheel is fixed on mandrel the bar shaft end and is connected with reducer output shaft, power shaft connecting brake and the motor of reducer, lifting rope and counterweight lifting rope end are locked on driving wheel, and winding direction is opposite, and fork and pulley rope mechanism are installed on support and mandrel.
Because the sucker rod position of above-mentioned oil pumper is fixed, therefore, when needs are safeguarded well head, need to first pull down sucker rod, in order to avoid the existence of sucker rod impacts the maintenance of well head, thereby affect its efficient.
secondly, sucker rod is in rising and descending stroke, its required tractive force comprises the weight of sucker rod, the weight of oil and the frictional force of whole transmission mechanism, because the weight of oil progressively alleviates, and frictional force is opposite with the direction of motion of sucker rod, therefore, linear change between the minimum value Fmin that is used for prescribing a time limit under maximum value Fmax that the tractive force (polished rod load) of oil pumping rod end can be when upstroke be just started and down stroke arrival, and in order to reduce the peak torque of traction machine as far as possible, usually be the average that the tractive force of balancing weight is arranged on above-mentioned maximum value and minimum value with the weight W of balancing weight, be W=(Fmax+Fmin)/2, and then power and the specification of reduction traction machine, be conducive to reduce costs.The tractive force that produces due to the balancing weight of above-mentioned oil pumper is invariable, traction machine is in the upstroke that promotes sucker rod, and during ground zero, the tractive force that balancing weight provides is less than the required tractive force of oil pumping rod end, this moment, traction machine was made positive work to sucker rod, played the traction enhancement effect; When sucker rod progressively rises, its required tractive force (polished rod load) progressively reduces, the tractive force that balancing weight produces is during greater than the required tractive force of oil pumping rod end, traction machine begins to flog a dead horse, that is to say, traction machine plays the effect of a resistance and brake, so that keep balance between the tractive force that balancing weight produces and the required tractive force of oil pumping rod end, thus reduced the operating efficiency of traction machine.
Further, what reducing gear adopted usually is large-scale multi-stage gear reduction box, because the volume of gear reduction box is larger, its manufacture difficulty is large, cost is high, and reduction box can produce larger noise in the running, particularly, owing to merely relying on gear reduction box to slow down, and the impact that reduction box produces due to the gap between gear when rotating can be directly delivered on sucker rod, and sucker rod bears continually this impact and easily causes the sucker rod bar that breaks, thereby shortens its application life, and increase maintenance work amount at ordinary times, be not easy to maintenance.
The utility model content
The purpose of this utility model is to solve the inconvenient problem of the existing well head maintenance of tower shelf type oil pumping machine of prior art, and a kind of tower shelf type oil pumping machine that facilitates well head to safeguard is provided.
Another purpose of the present utility model is to solve the problem that the existing electric efficiency of tower shelf type oil pumping machine is low, the reducing gear impact is large of prior art, and the tower shelf type oil pumping machine that a kind of electric efficiency is high, the impact of reducing gear is little is provided.
to achieve these goals, the utility model is by the following technical solutions: a kind of tower shelf type oil pumping machine, comprise pylon, be fixed on the traction machine on pylon, sucker rod, balancing weight, traction machine is connected with traction sheave by reducing gear, traction sheave is respectively equipped with the pull rope of connecting with pumping rod and balancing weight, pull rope on traction sheave is by transmission mechanism and sucker rod, balancing weight is connected, be provided with wheel stand near sucker rod one side on pylon, wheel stand is rotationally connected near traction sheave one end and pylon, be provided with rotary position limiting structure between pylon and wheel stand, the other end in the wheel stand outside is provided with directive wheel, the connection traction sheave is walked around directive wheel with the pull rope of sucker rod and is connected with sucker rod.
Rotating due to wheel stand on pylon, therefore, when needs carry out workover treatment, can be with upwards upset of wheel stand, and make wheel stand be positioned at roughly vertical state by corresponding rotary position limiting structure, thus make sucker rod can leave easily original pithead position, by reasonably being set, guiding takes turns to the distance of wheel stand center of rotation, can guarantee that sucker rod shifts out pithead position fully, thereby facilitate workover treatment.
As preferably, a wheel stand end in the outer part is provided with a bearing support, be slidably connected by guide rail between bearing support and wheel stand, simultaneously at the be rotatably connected adjusting rod 91 of a level of a side of bearing support, adjusting rod is provided with screw thread, be fixedly installed the adjusting nut 92 that is threaded with adjusting rod on wheel stand, described directive wheel is rotatably connected on bearing support.
Because adjusting nut is fixed, therefore, by rotary regulating lever, can realize moving horizontally of adjusting rod, thereby drive moving horizontally of directive wheel, to realize the fine setting of sucker rod position, be conducive to oil pumping and aim at exactly well head.
As preferably, be provided with clamping element in the pull rope end of connecting with pumping rod, the clamping element lower end is connected with sucker rod, and the clamping element upper end is provided with inclined-plane, a location.
When needs are safeguarded well head and wheel stand upwards are turned to roughly vertical position, can tighten up the pull rope of connecting with pumping rod, the highest point that makes sucker rod increase, because the clamping element upper end has inclined-plane, a location, therefore, form a less angle between the sucker rod of this moment and wheel stand, the existing location that is beneficial to sucker rod, inclined-plane, location, avoid it to rock, simultaneously, be conducive to sucker rod and keep a roughly downward state.
as preferably, described transmission mechanism comprises the first combination guide wheel of the both sides of being located at respectively traction sheave, the second combination guide wheel, described the first combination guide wheel is by coaxial first guide wheel, the first little guide wheel forms, described the second combination guide wheel is by coaxial second largest guide wheel, the second little guide wheel forms, traction sheave and first, be respectively equipped with transmission between second largest guide wheel with flat pull rope, and between the first little guide wheel and sucker rod, also be respectively equipped with pull rope between the second little guide wheel and balancing weight, be arranged on traction sheave and first, pull rope two ends between second largest guide wheel fixing and be wound on traction sheave and first respectively stackedly, on second largest guide wheel, pull rope one end that is arranged between the first little guide wheel and sucker rod is fixed and is wound on the first little guide wheel stackedly, the other end is connected with sucker rod, pull rope one end that is arranged between the second little guide wheel and balancing weight is fixed and is wound on the second little guide wheel stackedly, the other end is connected with balancing weight, the coiling direction of pull rope on traction sheave that is arranged between traction sheave and first guide wheel is consistent with the coiling direction of the first little guide wheel and second largest guide wheel overhanging cable, the coiling direction of pull rope on traction sheave that is arranged between traction sheave and second largest guide wheel is consistent with the coiling direction of the second little guide wheel and first guide wheel overhanging cable, and the coiling direction of first guide wheel and second largest guide wheel overhanging cable is opposite.
Existing tower shelf type oil pumping machine is all generally to slow down by gear reduction box, to increase the lifting force to sucker rod, reduce the output torque of traction machine (motor), and then the power of reduction traction machine is to reach energy-conservation purpose.Yet the tractive force that produces due to balancing weight is constant, therefore can't solve the problem that traction machine flogs a dead horse all the time in the upstroke of sucker rod.Adopted the combination guide wheel of one group of elevator mode in transmission mechanism of the present utility model, its pull rope is to be wound on traction sheave, large guide wheel and little guide wheel stackedly, therefore the winding radius of pull rope is constantly to change when rotating, correspondingly by balancing weight produce to the tractive force of oil pumping rod end also in continuous change.At first the rotation of traction machine slows down by reducing gear, and then slows down by large guide wheel, to reduce the power of traction machine, is conducive to the impact that reduces the speed reducing ratio of reducing gear and turning round when.Simultaneously, when traction machine rotate to drive that sucker rod rises and when balancing weight descends, the winding radius of the pull rope on the second little guide wheel progressively reduces, and the winding radius of second largest guide wheel overhanging cable progressively increases, the winding radius of pull rope on second largest guide wheel on traction sheave progressively reduces, so balancing weight progressively reduces by the tractive force that the second combination guide wheel is delivered on traction sheave; Therewith in like manner, the winding radius that is wound on the pull rope on the first little guide wheel progressively increases, and the winding radius of first guide wheel overhanging cable progressively reduces, the winding radius of pull rope on first guide wheel on traction sheave progressively increases, therefore, the tractive force that produces of balancing weight further reduces after through the first combination guide wheel.like this, sucker rod is thereon in stroke, although its required tractive force progressively reduces, but, the tractive force to sucker rod that produces due to balancing weight also correspondingly reduces, thereby can effectively avoid causing traction machine to flog a dead horse because of the tractive force that balancing weight produces greater than the required tractive force of sucker rod, by adjusting respectively first, second largest guide wheel, first, the diameter of the second little guide wheel and traction sheave, can realize easily that sucker rod is when arriving the upper limit position of upstroke, the required tractive force of oil pumping rod end equates substantially with the tractive force that balancing weight produces, thereby thoroughly solve the problem that traction machine flogs a dead horse, effectively improve the operating efficiency of traction machine, and the starting load during the traction machine backward rotation can be zero substantially, thereby the reverse starting that is conducive to traction machine.Particularly, when sucker rod drops to the lower position of down stroke, in existing oil pumper, the tractive force of balancing weight will be greater than the required tractive force of sucker rod, because there is the gear fit clearance in reduction box, therefore, traction machine can drop rapidly at the moment balancing weight of counter-rotating, thereby sucker rod is produced an impact force.Therefore the utility model, can be avoided traction machine at counter-rotating moment balancing weight, sucker rod to be produced and impact owing to can realizing the in a basic balance of power between balancing weight and sucker rod.In addition, itself has cushioning effect guide wheel mechanism, can be conducive to avoid the impact force with reducing gear to pass to sucker rod.
As preferably, described reducing gear is pulley decelerates mechanism, and it comprises the small belt pulley coaxial with traction machine, the big belt pulley coaxial with traction sheave, connects by driving belt between small belt pulley and big belt pulley.Impact when employing pulley decelerates mechanism is conducive to further reduce backward rotation is to extend the application life of sucker rod.
Certainly, reducing gear also can adopt gear reduction, and it comprises the driving gear coaxial with traction machine, the driven gear coaxial with traction sheave, driving gear and driven gear engagement.As previously mentioned, large guide wheel of the present utility model has decelerating effect, and therefore, corresponding gear reduction only need adopt the one-level transmission can satisfy the deceleration needs, and corresponding gear clearance will reduce widely, thereby be conducive to reduce counter-rotational impact.
As preferably, described balancing weight one side is provided with the T-slot that along continuous straight runs extends to the balancing weight center, end at the pull rope that connects balancing weight is provided with the T-connecting piece adaptive with T-slot, T-connecting piece is arranged in T-slot, the balancing weight upper surface is positioned at T-connecting piece and is provided with press strip near T-slot opening one side, and described press strip compresses the T-connecting piece side.
The T-connecting piece of pull rope end can slip in the T-slot of balancing weight quickly and easily, thereby facilitates carry and the unloading of balancing weight, and press strip can avoid T-connecting piece automatically to skid off in T-slot, guarantees its safety.Be the center that is positioned at balancing weight due to T-connecting piece, thereby balancing weight can keep level substantially in lifting process, be conducive to reduce the lateral force that press strip bears, improve its safety.
Therefore, the utlity model has following beneficial effect: facilitate well head to safeguard, can avoid traction machine to flog a dead horse when upward stroke, effectively improved the efficient of traction machine, and the impact can eliminate backward rotation the time, extend application life of sucker rod, improve security performance.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the axial partial sectional view of the utility model the second combination guide wheel;
Fig. 4 is a kind of structural representation of rotary position limiting structure;
Fig. 5 is the another kind of structural representation of rotary position limiting structure;
Fig. 6 is the structural representation after wheel stand of the present utility model upwards rotates.
in figure: 1, pylon 2, traction machine 21, reducing gear 3, sucker rod 4, balancing weight 5, controller 6, traction sheave 7, the first combination guide wheel 71, first guide wheel 711, large guide wheel sheet 72, the first little guide wheel 8, the second combination guide wheel 81, second largest guide wheel 82, the second little guide wheel 821, little guide wheel sheet 9, directive wheel 91, adjusting rod 92, adjusting nut 93, wheel stand 94, bearing support 10, U-shaped guide groove 11, pull rope 12, T-connecting piece 13, T-slot 14, press strip
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
In embodiment as shown in Figure 1 and Figure 2, a kind of tower shelf type oil pumping machine of the present utility model, comprise pylon 1, traction machine 2, traction sheave 6, transmission mechanism, sucker rod 3, balancing weight 4 and controller 5, traction sheave flatly is arranged on the centre position of pylon upper brace, traction machine is connected with traction sheave by reducing gear 21, reducing gear employing pulley decelerates mechanism, it comprises the small belt pulley coaxial with traction machine, the big belt pulley coaxial with traction sheave, connects by driving belt between small belt pulley and big belt pulley.Certainly, reducing gear also can adopt gear reduction, and it comprises the driving gear coaxial with traction machine, the driven gear coaxial with traction sheave, driving gear and driven gear engagement.
Transmission mechanism comprises the first combination guide wheel 7, the second combination guide wheel 8 that is set in parallel in the traction sheave left and right sides, the first combination guide wheel is comprised of the first guide wheel 71, the first little guide wheel 72 that are fixed on same turning cylinder, the first little guide wheel wherein is located at the centre of turning cylinder, first guide wheel is made of two identical large guide wheel sheets 711, and it is located at the both sides of the first little guide wheel symmetrically; The second combination guide wheel is comprised of the second largest guide wheel 81, the second little guide wheel 82 that are fixed on same turning cylinder equally, second largest guide wheel wherein is located at the centre of power transmission shaft, the second little guide wheel is made of two identical little guide wheel sheets 821, and it is located at the both sides of second largest guide wheel symmetrically.the outside near the first combination guide wheel on pylon is provided with wheel stand 93, wheel stand arranges axis hole near the first combination guide wheel one end, correspondingly, rotary shaft rack 96 and rotating shaft 97 are set on pylon, the shaft hole sleeve of wheel stand is connected in the rotating shaft of pylon, thereby wheel stand and pylon are formed to be rotationally connected, and between pylon and wheel stand, rotary position limiting structure is set, the other end in the wheel stand outside is provided with a bearing support 94, the rotating directive wheel 9 that is provided with on bearing support, be slidably connected by guide rail between bearing support and wheel stand, simultaneously at the be rotatably connected adjusting rod 91 of a level of a side of bearing support, adjusting rod is provided with screw thread, and be fixedly installed the adjusting nut 92 that is threaded with adjusting rod on wheel stand, because adjusting nut is fixed, therefore, pass through rotary regulating lever, can realize moving horizontally of adjusting rod, thereby drive moving horizontally of directive wheel, aim at well head in order to make sucker rod.Rotary position limiting structure between pylon and wheel stand can adopt multiple existing position limiting structure, as shown in Figure 4, can on the axis hole end face of wheel stand 93, arc-shaped limit groove 95 be set, and correspondingly, on the rotary shaft rack 96 of pylon, spacing preiection 98 is set; Perhaps as shown in Figure 5, can on rotating shaft 97 peripheries of pylon, arc-shaped limit groove 95 be set, correspondingly arrange at the corresponding arc-shaped limit groove of wheel stand place and pass axis hole and enter into banking pin 99 in the arc-shaped limit groove.
As shown in Figure 6, when needs carry out workover treatment, wheel stand upwards can be turned to roughly vertical state, in order to make sucker rod leave original pithead position, thereby facilitate workover treatment.Certainly, our rotary branching holder that also can be slidably connected on pylon, then the end with wheel stand is rotatably connected on rotary branching holder, be fixedly connected with between the bearing support of directive wheel and wheel stand, simultaneously adjusting nut be arranged on pylon, adjusting rod is arranged on rotary branching holder, like this, so that when aiming at well head, rotatable adjusting rod is so that driving rotary branching holder moves horizontally when the position of the mobile sucker rod of needs, and then to drive directive wheel be that sucker rod moves; And need to carry out workover treatment the time, still wheel stand upwards can be turned to roughly vertical state, in order to make sucker rod leave original pithead position, thereby facilitate workover treatment.
For ease of the coiling of pull rope, as shown in Figure 3, on two that are arranged side by side two U-shaped guide groove 10, the second little guide wheels on second largest guide wheel little guide wheel sheets, the U-shaped guide groove is set respectively also.Correspondingly, be arranged side by side four U-shaped guide grooves that are used for coiling pull rope 11 on the face of cylinder of columniform traction sheave, wherein two U-shaped guide grooves of being located in the middle of traction sheave are used for reeling and connect the pull rope of second largest guide wheel, and two U-shaped guide grooves being located at symmetrically traction sheave both sides are used for reeling and connect the pull rope of first guide wheel.On two large guide wheel sheets of first guide wheel, the U-shaped guide groove is set respectively also, is arranged side by side two U-shaped guide grooves on the first little guide wheel.As shown in Figure 2, be provided with two pull ropes 11 with transferring power between traction sheave and first guide wheel, article two, an end of pull rope is fixing respectively also is wound in the U-shaped guide groove of two large guide wheel sheets of first guide wheel stackedly, and the other end is fixed respectively and is wound in the U-shaped guide groove in two outsides corresponding on traction sheave stackedly; Be provided with equally two pull ropes with transferring power between traction sheave and second largest guide wheel, article two, an end of pull rope is fixing respectively also is wound in two U-shaped guide grooves of second largest guide wheel stackedly, and the other end is fixed respectively and is wound in the U-shaped guide groove of two centres corresponding on traction sheave stackedly.In addition, between the first little guide wheel and sucker rod, be respectively equipped with the pull rope of two traction use between the second little guide wheel and balancing weight, two pull rope one ends that are arranged between the first little guide wheel and sucker rod are fixed respectively and are wound in two U-shaped guide grooves of the first little guide wheel stackedly, and the other end is connected with sucker rod after walking around directive wheel; Pull rope end at connecting with pumping rod is provided with clamping element 15, and the clamping element lower end is connected with sucker rod, and the clamping element upper end is provided with inclined-plane 16, a location.As shown in Figure 1, two pull rope one ends that are arranged between the second little guide wheel and balancing weight are fixed respectively in the U-shaped guide groove that also is wound on two little guide wheel sheets of the second little guide wheel stackedly, the other end is fixedly connected with T-connecting piece 12, and it comprises the cylindrical straight-bar that top is connected with pull rope and the disk that is extended to form integrative-structure by the straight-bar soffit.Correspondingly, on the balancing weight side, the T-slot 13 that two along continuous straight runs extend to the balancing weight center is set, size and the T-connecting piece of T-slot are suitable, thereby make two T-connecting pieces pass in and out and to be positioned in respectively in two T-slots.Simultaneously, the balancing weight upper surface is positioned at T-connecting piece and near T-slot opening one side, one press strip 14 is set, and this press strip is fixed by screws on balancing weight, and a side of press strip compresses the side of T-connecting piece, thereby can avoid T-connecting piece from T-slot from skidding off.When needs unloading balancing weight, only need the dismounting press strip, T-connecting piece is skidded off from T-slot, balancing weight is separated with pull rope.The coiling direction of pull rope on traction sheave that is arranged between traction sheave and first guide wheel is consistent with the coiling direction of the first little guide wheel and second largest guide wheel overhanging cable, the coiling direction of pull rope on traction sheave that is arranged between traction sheave and second largest guide wheel is consistent with the coiling direction of the second little guide wheel and first guide wheel overhanging cable, and the coiling direction of first guide wheel and second largest guide wheel overhanging cable is opposite.On the traction sheave right side, sucker rod produces a clockwise moment of torsion by pull rope and the first combination guide wheel to traction sheave; In the traction sheave left side, balancing weight produces an anticlockwise moment of torsion by pull rope and the second combination guide wheel to traction sheave.Above-mentioned pull rope can adopt flat elevator composite steel band, composite steel band not only intensity is high, and be conducive to stacked coiling in the U-shaped guide groove, and two pull ropes are set respectively between traction sheave and first, second large guide wheel and between the first little guide wheel and sucker rod, the second little guide wheel and balancing weight, both be conducive to guarantee the intensity of pull rope, be convenient to simultaneously structural configuration, make the rotating shaft stress equalization of traction sheave rotating shaft and first, second combination guide wheel, to improve the mechanical strength of transmission mechanism.
At last, a ratchet is set on traction sheave coaxially, is fixedly installed a Self-resetting electromagnet on pylon, the Self-resetting electromagnet is positioned at the below of ratchet, the core ends of electromagnet arranges positioning head, the shape of positioning head and the adaptive (not shown) of the slot form of ratchet.When needing repairing, make electromagnet energising, iron core moves up, and makes the ratchet locking thereby drive in the teeth groove that positioning head enters ratchet; When electromagnet cut off the power supply, iron core moved down under the effect of back-moving spring and resets, and resetted and withdrawed from the teeth groove of ratchet, the equipment normal operation thereby drive positioning head.
Oil rig of the present invention operating principle in the running is as follows:
As shown in Figure 1, when sucker rod the oil pumping upstroke the time, traction machine and balancing weight provide tractive force to make sucker rod increase simultaneously, traction machine tentatively slows down and drives traction sheave by reducing gear and rotates, balancing weight drives traction sheave by the second combination guide wheel and rotates, and traction sheave is under the acting in conjunction of traction machine and balancing weight, and the pull rope on it slows down through the first combination guide wheel again, then pull rope produces draw by directive wheel to sucker rod, the oil pumping thereby the traction sucker rod rises.when upward stroke, traction machine drives the traction crop rotation and rotates counterclockwise, traction sheave drives first guide wheel by pull rope and rotates counterclockwise, being fixed in the first little guide wheel in same rotating shaft with first guide wheel synchronizes and rotates counterclockwise, and by being wound on the pull rope traction sucker rod rising oil pumping on the first little guide wheel, meanwhile, the steel band that is connected with second largest guide wheel on traction sheave progressively discharges, balancing weight drives the second little guide wheel by pull rope and rotates counterclockwise, and drive and to be fixed in second largest guide wheel on same axle with the second little guide wheel and to synchronize and rotate counterclockwise, then by traction sheave, tractive torque is delivered on the first combination guide wheel and rises with the traction sucker rod.in the progressively uphill process of sucker rod, the the second little guide wheel overhanging cable that is connected with balancing weight progressively discharges, therefore its winding radius progressively reduces, because moment of torsion equals the active force of pull rope and the product of pull rope winding radius, thereby make balancing weight also progressively be linear decrease to the tractive torque that the second little guide wheel produces, simultaneously, the pull rope of reeling on second largest guide wheel progressively increases, therefore its winding radius also progressively increases, due to second largest, moment of torsion on little guide wheel is equal-sized, therefore, the second largest guide wheel of this moment progressively reduces the tractive force of the pull rope of connection traction sheave, and the winding radius of this pull rope on traction sheave also progressively reduces, therefore the tractive torque of traction sheave further reduced, further, the winding radius that connects the pull rope of first guide wheel on traction sheave progressively increases, and the winding radius of first guide wheel overhanging cable progressively reduces, therefore, the moment of torsion that the moment of torsion that above-mentioned balancing weight produces is delivered on the first little guide wheel after by traction sheave and first guide wheel reduces again, and the winding radius of the first little guide wheel progressively increases, so the tractive force that above-mentioned moment of torsion produces on the pull rope of connecting with pumping rod diminishes, that is to say, the tractive force that the tractive force of balancing weight finally is delivered on sucker rod after by above-mentioned transmission mechanism progressively reduces, thereby progressively reduce corresponding with the required tractive force of sucker rod, avoided the balancing weight defective invariable to the tractive force of sucker rod in existing tower-type oil pumping device.
When sucker rod arrived the upper limit position of upstroke, correspondingly, balancing weight arrived the lower position of its stroke, and controller is controlled the traction machine backward rotation, and sucker rod enters descending stroke.When sucker rod arrived the lower position of its down stroke, controller was controlled the traction machine counter-rotating, began second oil pumping circulation, so constantly was cycled to repeat and can realizes continuous oil pumping.
The parameters such as the diameter by reasonably selecting the first large and small guide wheel and the second large and small guide wheel and thickness of strips, can realize easily that sucker rod is in whole upward stroke, the tractive force that balancing weight produces is slightly less than the required tractive force of sucker rod, like this, can guarantee that not only traction machine does not flog a dead horse in whole upstroke, reduce the power consumption of traction machine, simultaneously can greatly reduce the starting torque of traction machine when backward rotation, thereby be conducive to improve the startability of traction machine, reduce the impact of excessive starting current, extend the application life of traction machine.When sucker rod is in descending stroke, its weight is constant, but corresponding direction is opposite, and, the moment of torsion that sucker rod is delivered on traction sheave progressively reduces, and the moment of torsion that balancing weight is delivered on traction sheave progressively increases, therefore, traction machine still can not done negative work, and the tractive force that sucker rod and traction machine produce jointly draws balancing weight and makes its rising accumulation of energy.Particularly, when the sucker rod counter-rotating begins to enter upstroke, because the difference in torque distance that is produced by balancing weight and sucker rod on traction sheave is little, therefore for the oil pumper that adopts gear reduction, counter-rotating rapidly can not appear in traction sheave, thereby can effectively avoid the impact of balancing weight when counter-rotating to be delivered on sucker rod.
The above is only a kind of typical structure of the present invention, can basic principle according to the present invention make a lot of changes as those skilled in the art, for example: change balancing weight wherein into sucker rod, can realize the both sides oil pumping; Traction machine and traction sheave also can be arranged on the bottom of pylon; And that first, second combination introduction that be used for to slow down can be designed to secondary as required is even multistage.Connect in addition the also available common wire rope replacement of composite steel band of balancing weight and the second little guide wheel, sucker rod and the first little guide wheel.

Claims (7)

1. tower shelf type oil pumping machine, comprise pylon (1), be fixed on the traction machine (2) on pylon, sucker rod (3), balancing weight (4), traction machine is connected with traction sheave (6) by reducing gear (21), traction sheave is respectively equipped with the pull rope (11) of connecting with pumping rod and balancing weight, pull rope on traction sheave is by transmission mechanism and sucker rod, balancing weight is connected, it is characterized in that, be provided with wheel stand (93) near sucker rod one side on pylon, wheel stand is rotationally connected near the first traction sheave one end and pylon, be provided with rotary position limiting structure between pylon and wheel stand, the other end in the wheel stand outside is provided with directive wheel (9), the connection traction sheave is walked around directive wheel with the pull rope (11) of sucker rod and is connected with sucker rod.
2. a kind of tower shelf type oil pumping machine according to claim 1, it is characterized in that, a wheel stand end in the outer part is provided with a bearing support (94), be slidably connected by guide rail between bearing support and wheel stand, simultaneously at the be rotatably connected adjusting rod 91 of a level of a side of bearing support, adjusting rod is provided with screw thread, is fixedly installed the adjusting nut 92 that is threaded with adjusting rod on wheel stand, and described directive wheel is rotatably connected on bearing support.
3. a kind of tower shelf type oil pumping machine according to claim 2, is characterized in that, is provided with clamping element (15) in the pull rope end of connecting with pumping rod, and the clamping element lower end is connected with sucker rod, and the clamping element upper end is provided with inclined-plane (16), a location.
4. according to claim 1 and 2 or 3 described a kind of tower shelf type oil pumping machines, it is characterized in that, described transmission mechanism comprises the first combination guide wheel (7) of the both sides of being located at respectively traction sheave, the second combination guide wheel (8), described the first combination guide wheel is by coaxial first guide wheel (71), the first little guide wheel (72) forms, described the second combination guide wheel is by coaxial second largest guide wheel (81), the second little guide wheel (82) forms, traction sheave and first, be respectively equipped with transmission between second largest guide wheel with flat pull rope (11), and between the first little guide wheel and sucker rod, also be respectively equipped with pull rope between the second little guide wheel and balancing weight, be arranged on traction sheave and first, pull rope two ends between second largest guide wheel fixing and be wound on traction sheave and first respectively stackedly, on second largest guide wheel, pull rope one end that is arranged between the first little guide wheel and sucker rod is fixed and is wound on the first little guide wheel stackedly, the other end is connected with sucker rod, pull rope one end that is arranged between the second little guide wheel and balancing weight is fixed and is wound on the second little guide wheel stackedly, the other end is connected with balancing weight, the coiling direction of pull rope on traction sheave that is arranged between traction sheave and first guide wheel is consistent with the coiling direction of the first little guide wheel and second largest guide wheel overhanging cable, the coiling direction of pull rope on traction sheave that is arranged between traction sheave and second largest guide wheel is consistent with the coiling direction of the second little guide wheel and first guide wheel overhanging cable, and the coiling direction of first guide wheel and second largest guide wheel overhanging cable is opposite.
5. according to claim 1 and 2 or 3 described a kind of tower shelf type oil pumping machines, it is characterized in that, described reducing gear is pulley decelerates mechanism, and it comprises the small belt pulley coaxial with traction machine, the big belt pulley coaxial with traction sheave, connects by driving belt between small belt pulley and big belt pulley.
6. according to claim 1 and 2 or 3 described a kind of tower shelf type oil pumping machines, is characterized in that, described reducing gear comprises the driving gear coaxial with traction machine, the driven gear coaxial with traction sheave, driving gear and driven gear engagement.
7. according to claim 1 and 2 or 3 described a kind of tower shelf type oil pumping machines, it is characterized in that, described balancing weight one side is provided with the T-slot (13) that along continuous straight runs extends to the balancing weight center, end at the pull rope that connects balancing weight is provided with the T-connecting piece adaptive with T-slot (12), T-connecting piece is arranged in T-slot, the balancing weight upper surface is positioned at T-connecting piece and is provided with press strip (14) near T-slot opening one side, and described press strip compresses the T-connecting piece side.
CN 201220620098 2012-11-22 2012-11-22 Tower-type oil pumping machine Active CN202970641U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016015535A1 (en) * 2014-07-31 2016-02-04 孙宝利 Pendulum type pumping unit with t-shaped walking beam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016015535A1 (en) * 2014-07-31 2016-02-04 孙宝利 Pendulum type pumping unit with t-shaped walking beam

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