CN116838299A - Electric balance flexible traction pumping unit - Google Patents

Abstract

The invention discloses an electric balance flexible traction pumping unit, which comprises a base, a plurality of support plates and a plurality of support plates, wherein the base is used for supporting all parts; the tower is arranged on the base; the host is arranged on the base at one side of the tower, and at least comprises a motor and a controller, and the controller is electrically connected with the motor; a guide mounted on top of the tower; the flexible transmission piece is connected with the load from one side of the guide piece to the other side of the guide piece along the guide structure of the guide piece, and the other end of the flexible transmission piece is connected with the motor through a transmission device; in the up-stroke stage of the load, the flexible transmission piece drives the load to lift; and in the down stroke stage of the load, the flexible transmission piece drives the motor to generate power.

Description

An electrically balanced flexible traction oil pumping unit

Technical field

The invention relates to the technical field of oil pumping units, and in particular to an electrically balanced flexible traction oil pumping unit.

Background technique

At present, the pumping units commonly used in petroleum mining machinery are beam pumping units and vertical pumping units. The beam-type oil pumping unit is composed of a motor, a belt reduction device, a gear reducer, and a four-bar linkage mechanism. The four-bar linkage mechanism reciprocates around the pin on the beam bracket, driving the donkey head to move up and down so that the polished rod drives the oil pump up and down. Exercise achieves the purpose of oil extraction.

Although the oil pumping efficiency of the existing vertical oil pumping unit has been improved, its tower is tall, the volume and weight are large, installation and maintenance are difficult and risky, the transmission parts are easy to wear, and the entire oil well needs to be offset during maintenance, which is inconvenient to operate. , the entire pumping unit has high maintenance costs and high energy consumption; the improved method of setting counterweights can theoretically reduce energy consumption, but in actual applications, due to changes in the oil well site environment, it is sometimes necessary to adjust the counterweights, which is time-consuming and labor-intensive, affecting Well production.

The pumping unit with the above structure has the following shortcomings: ① Low mechanical efficiency: the reciprocating motion from the motor shaft to the polished rod is realized through belt reduction, gear reducer, four-bar linkage mechanism, etc. The process consumes a lot of energy and the mechanical transmission efficiency Very low.

② Transmission parts are easy to wear and have a short service life: In order to achieve polished rod movement, a large driving torque is required. The increase in torque causes the parts to wear out quickly, resulting in a short service life of the transmission parts.

③Poor pertinence: It is difficult to adjust the stroke and stroke frequency of the pumping unit to adapt to the needs of the oil field structure and underground oil content.

④ It is inconvenient to transport and install. The existing pumping unit structure has a fixed overall structure and is not easy to disassemble and assemble, making it inconvenient to transport and install.

In summary, existing pumping units have many problems such as efficiency, cost, and energy consumption.

Contents of the invention

The purpose of the present invention is to solve the above technical problems and provide an electrically balanced flexible traction oil pumping unit, which can reduce energy consumption and make the structure simple and easy to maintain.

In order to achieve the above object, the present invention adopts the following technical solution: an electrically balanced flexible traction oil pumping unit, including

Base, used to support various components;

Tower, set on the base;

The main machine is arranged on the base on one side of the tower. The main machine at least includes a motor and a controller, and the controller is electrically connected to the motor;

A guide member installed on the top of the tower;

Flexible transmission member, the flexible transmission member moves from one side of the guide member to the other side of the guide member along the guide structure of the guide member, one end of the flexible transmission member is connected to the load, and the other end of the flexible transmission member passes through the transmission device Connected to the motor; during the upstroke stage of the load, the flexible transmission member drives the load to lift; during the downstroke stage of the load, the flexible transmission member drives the motor to generate electricity;

Energy storage device, the energy storage device is electrically connected to the motor and the controller. The energy storage device stores the electric energy generated by the motor during the down stroke stage of the load; and provides electric energy to the motor during the up stroke stage of the load. The load is lifted through the flexible transmission part.

The energy storage device is electrically connected to the motor, and the controller is electrically connected to the motor and the energy storage device; the installation location of the energy storage device and the controller is not limited, and is generally installed close to the motor. The generated electricity generated by the motor during the under-load stroke phase is stored in the energy storage device. ; The controller includes a PLC (programmable logic device) controller, which realizes functions such as controlling motor movement, system signal acquisition, monitoring, and energy management through programming.

In order to improve the life of the motor and improve the energy efficiency of the motor, a further preferred technical solution is that the motor is a permanent magnet motor. The permanent magnet motor mainly consists of a base, a single-pitch winding, a hybrid permanent magnet rotor, and a concealed air duct. It is composed of forced ventilation and heat dissipation mechanism. The hybrid permanent magnet rotor consists of a rotor hub, N-pole rare earth magnetic poles, S-pole rare earth magnetic poles and inter-pole ferrite magnetic poles, which improves driving and power generation energy efficiency while reducing the amount of rare earth materials. The forced exhaust heat dissipation mechanism of the concealed air duct is composed of a casing, an air filter, an exhaust fan, a front end cover, a rear end cover, and an outer cover. It can effectively remove heat, reduce the motor temperature, and avoid demagnetization. , improves motor performance and extends motor life.

In order to improve the energy efficiency of the whole machine, in order to fully recover the potential energy accumulated in the upper stroke during the down stroke, an energy storage device is used to store the electrical energy converted by the motor into potential energy; the energy storage device is configured in the controller, and the controller at least includes PLC control Unit, frequency converter and its energy storage device. The energy storage device includes an inverter unit, a DC-DC unit and an energy storage unit; the inverter unit shares the inverter unit in the frequency converter; the inverter unit is electrically connected to the motor and the DC-DC unit respectively, and the energy storage unit is connected to the DC-DC unit. The DC unit is electrically connected; the inverter unit is used to process the electric energy emitted by the motor to obtain direct current; the DC-DC unit is used to convert the high voltage into a voltage matching the energy storage unit and charge and discharge the energy storage unit.

In order to improve the service life of the transmission part, a further preferred technical solution is that the flexible transmission part includes at least one transmission steel belt.

In order to improve the service life of the transmission parts, a further preferred technical solution is that one end of the transmission steel belt is connected to the load, and the other end is connected to the transmission device.

In order to improve the service life of the transmission part, a further preferred technical solution is that the flexible transmission part further includes at least one steel wire rope, one end of the transmission steel belt is connected to one end of at least one steel wire rope through a connector, and the other end of the steel wire rope One end is connected to the load, and the other end of the transmission steel belt is connected to the transmission device.

In order to improve the life of the guide member and prevent the steel belt or wire rope from deflecting, a further preferred technical solution is that the guide member includes at least one rigid pulley, and the outer circumferential surface of the rigid pulley is provided with at least one ring of grooves and The flexible transmission member cooperates.

In order to improve the service life of the guide member, a further preferred technical solution is that the guide member includes at least one rigid pulley, the outer circumferential surface of the rigid pulley is provided with at least one ring of grooves, and the groove is provided with at least one ring of grooves. Plastic composite part, the plastic composite part is provided with at least one circle of wire trough to cooperate with the steel wire rope. The plastic composite part is a circular ring composed of multiple arc-shaped strips. There is a groove on the outside of the ring that matches the steel wire rope, and the ring is embedded in the groove on the surface of the pulley.

In order to improve the service life of the guide and facilitate installation and adjustment, a further preferred technical solution is that one end of the transmission steel belt is provided with a lock to connect to the transmission device, and the other end is provided with a connector to connect the load. The lock is a strip-shaped plate with a groove in the middle of one end. One end of the steel strip is inserted into it and fixed together through a riveting process. The connector is a hollow plate with one end similar to a lock and a groove in the middle. The other end of the steel strip is inserted into it and fixed together through a riveting process. The other end of the connector is similar to a beam when used, with a hole in the middle and a polished rod passing through it. , put the polished pole clamp on the polished pole above the beam and fix it, and the polished pole will be hung on the beam. When the steel belt runs up and down, it drives the polished rod to move up and down together.

In order to reverse the guide wheel bracket toward the top of the tower or translate in the direction away from the wellhead, so as to make more space for well workover, a further preferred technical solution is that the guide member is movably connected to the tower through the guide member bracket.

In order to meet the need for larger operating space during well workover, a further preferred technical solution is to remove the fasteners and positioning pins at the interconnection of each bracket, move the upper bracket away from the wellhead and fix it, or Remove the upper bracket, or remove the entire bracket.

The transmission device includes a reducer, the input end of the reducer is connected to the motor output, the output end of the reducer is equipped with a roller, and the transmission steel belt is wrapped around the roller; The other end of the input end is equipped with a brake. The braking method can be disc brake, block brake, drum brake or sleeve brake. The above methods can be any one, and the forms are diversified to suit different requirements. The drum is welded or cast from multiple steel plates and steel pipes. A slit matching the steel belt lock is cut at its edge, and the steel belt lock is inserted into it and pressed with a baffle to prevent it from coming out.

In order to facilitate the manufacture and installation of the tower, as well as to facilitate the installation, a further preferred technical solution is that the tower is composed of several single-section brackets stacked, and the two-section brackets are directly connected or connected through flat plates so that they can be connected to each other. Can be panned. The height of the tower depends on the wellhead height, anti-offset distance and stroke, and is generally in the range of 5 meters to 15 meters. The height of the single-section bracket depends on the length of the raw material, the height of the tower, etc., and is generally in the range of 1 meter to 6 meters. The bottom and top brackets are lower and the middle bracket is higher.

In order to reverse the guide wheel bracket toward the top of the tower to allow more workover space, a further preferred technical solution is that the base is provided with a vertically arranged hydraulic cylinder, and the bottom of the hydraulic cylinder is hinged at the The base; the side of the guide bracket away from the load is hinged to the tower through a hinge axis, and a slider is provided at the bottom of the guide bracket, and the slider is connected to the hydraulic cylinder through a connecting rod. Piston rod connection.

In order to translate the tower away from the wellhead so as to make more space for workover, a further preferred technical solution is that the base is provided on a guide plate, and a guide rail is provided on the guide plate to slidingly cooperate with the base. A hydraulic cylinder is provided on the side of the guide plate away from the load, and the piston rod of the hydraulic cylinder is connected to one side of the base.

Compared with the existing technology, the beneficial effects of the present invention are: ① The oil pumping unit changes the previous beam structure through multiple speed reduction and four-link transmission, and uses a tower and a guide wheel to change the rotational motion of the driving host into a polished rod Linear motion, the movement method is simple, which greatly reduces the useless force and the component force that becomes resistance, thereby greatly reducing the energy consumption; the electric part uses permanent magnet materials to generate torque, replacing the asynchronous motor, and also reducing the reactive power loss , the driving efficiency and power generation efficiency of the entire pumping unit have been greatly improved. ② As a different structural mode of the present invention, the driving main engine is installed downward relative to the tower, and the matching form can be flexibly adjusted to facilitate the installation and maintenance of the pumping unit. ③ Changing the fixed structure form between the guide wheel bracket and the tower can ensure that when the equipment needs maintenance, the upper bracket can be removed or the guide wheel bracket can be reversed toward the top of the tower or translated away from the wellhead, thus allowing for greater workover work. space. ④The braking method can be disc brake, block brake, drum brake or sleeve brake. Any of the above factors can be used, and the forms are diversified to suit different requirements. ⑤The control of the driving host adopts PLC and special frequency converter, which can realize the random adjustment of oil well flushing frequency and stroke. ⑥ Taking advantage of the working conditions of the pumping unit, the gravitational potential energy of the load is collected during the lower stroke of the polished rod, and then collected into electrical energy; the collected electrical energy can be used by itself or fed back to the power grid.

Description of the drawings

Figure 1 is an isometric view of the angle steel layered translation tower and the single steel belt split base oil pumping unit of the present invention;

Figure 2 is an isometric view of the angle steel layered tower and the single steel belt split base oil pumping unit of the present invention;

Figure 3 is an isometric view of the angle steel integrated tower and the single steel belt integrated base pumping unit of the present invention;

Figure 4 is an isometric view of the angle steel integrated tower and the single steel belt integrated base pumping unit of the present invention;

Figure 5 is an isometric view of the I-beam integrated tower and the single steel wire rope steel belt integrated base oil pumping unit of the present invention;

Figure 6 is an isometric view of the I-beam integrated tower and the two-wheel, double-wire rope steel belt split-base oil pumping unit of the present invention;

Figure 7 is an isometric view of a single I-beam tower and a single steel wire rope steel belt integral base oil pumping unit according to the present invention;

Figure 8 is an isometric view of the mobile base oil pumping unit of the present invention;

Figure 9 is an isometric view of the rotation guide bracket of the present invention;

Figure 10 is an isometric view of the partial transmission steel belt of the present invention;

Figure 11 is an isometric view of the permanent magnet motor of the present invention;

In the picture: 1. Base; 2. Reel; 3. Reducer; 4. Brake; 5. Motor; 5.1 Machine base; 5.2. Single-pitch winding; 5.3. Hybrid permanent magnet rotor; 5.4. Forced air ventilation and heat dissipation mechanism; 5.4.1. Chassis; 5.4.2. Air filter; 5.4.3. Exhaust fan; 5.4.4. Front end cover; 5.4.5. Rear end cover; 5.4.6. Cover plate; 6. Tower; 7. Flexible transmission parts; 71. Lock; 72. Lower anti-impact device; 73. Upper anti-impact device; 74. Connector; 8. Guide bracket; 9. Guide piece; 10. Load; 11. Wire rope; 12. Hydraulic cylinder; 13. Guide plate; 14. Connecting rod; 15. Slider; 10. Hinge shaft.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments.

Example

As shown in Figure 1, an electrically balanced flexible traction oil pumping unit includes a base 1 for supporting various components; a tower 6 is provided on the base, and the tower 6 is composed of several single-section brackets. A rotating guide 7 is installed on the top of the tower 6; a main machine is provided on the base on one side of the tower 6. The main machine at least includes a motor 5 and a controller. The motor 5 is connected to the flexible transmission through a transmission device. One end of the flexible transmission member 7 is connected to the other end of the flexible transmission member 7 from one side of the guide member 9 along the guide structure of the guide member 9 to the other side of the guide member 9. The other end of the flexible transmission member 7 Connect the load. The load 10 is composed of polished rod, sucker rod, oil, resistance and other related elements. During the upper stroke stage of the load 10, the motor drives the load to lift through the flexible transmission member 7; during the lower stroke stage of the load 10 , the load drives the motor 5 to generate electricity through the flexible transmission part 7;

The motor 5 can be a multi-winding permanent magnet motor. The permanent magnets of the rotor of the permanent magnet motor can be independently excited. The rotor of the permanent magnet motor rotates under the mechanical energy of the pumping unit. The permanent magnet magnetic field of the rotor rotates and cuts the power generation winding, thereby realizing the feedback winding. During power generation operation, the energy generated by the permanent magnet motor is processed by modules such as the inverter, DC/AC unit, etc., and then temporarily stored in the energy storage device, and then provided to the motor in reverse;

As shown in Figure 11, the permanent magnet motor is mainly composed of a frame 5.1, a single-pitch winding 5.2, a hybrid permanent magnet rotor 5.3, a forced air exhaust heat dissipation mechanism 5.4 of a concealed air duct, etc. The hybrid permanent magnet rotor 5.3 consists of a rotor hub, N-pole rare earth magnetic poles, S-pole rare earth magnetic poles and inter-pole ferrite magnetic poles, which improves driving and power generation energy efficiency while reducing the amount of rare earth materials. The forced exhaust heat dissipation mechanism 5.4 of the concealed air duct is composed of the chassis 5.4.1, the air filter 5.4.2, the exhaust fan 5.4.3, the front end cover 5.4.4, the rear end cover 5.4.5, and the outer cover 5.4.6 Forming a concealed ventilation duct, it can effectively remove heat and reduce the motor temperature, thereby avoiding demagnetization, improving motor performance and extending motor life;

Furthermore, by moving the motor 5 from the top of the tower 6 to the base 1 for installation, the installation and maintenance of the pumping unit are facilitated; and the previous beam-type pumping unit with multiple reduction speeds and four-link transmission is changed. , using the tower 6 and the guide 9 to change the rotational motion of the driving host into the linear motion of the polished rod; the electric part uses permanent magnet materials to generate torque, replacing the asynchronous motor, and also reduces the reactive power loss, and the efficiency of the entire pumping unit is improved It has been greatly improved; by taking advantage of the operating conditions of the pumping unit, the gravitational potential energy of the load is collected during the lower stroke of the polished rod, and then collected into electrical energy; the collected electrical energy can be used by itself or fed back to the power grid;

Furthermore, in order to be able to store the electric energy generated by the motor 5 for self-use, and in order to ensure the safety and reliability of the energy storage device, the energy storage device is installed in the control cabinet; during the down stroke stage of the load 10, the energy storage device stores the electric energy generated by the motor 5. The electric energy is stored; in the upstroke stage of the load 10, electric energy is provided to the motor 5 to drive the load to lift through the flexible transmission member 7; the energy storage device can be carried out using one of lithium batteries, super nickel batteries and super capacitors. For energy storage, in this embodiment, supercapacitors are preferably used, and the supercapacitors have a longer life under the premise of meeting the performance requirements;

In order to improve the energy efficiency of the whole machine and fully recover the potential energy accumulated in the upper stroke during the down stroke, an energy storage device is used to store the electrical energy converted by the motor into potential energy. The energy storage device includes an inverter unit, a DC-DC unit and an energy storage unit; among which the inverter unit The conversion unit shares the inverter unit in the frequency converter; the inverter unit is electrically connected to the motor and the DC-DC unit respectively, and the energy storage unit is electrically connected to the DC-DC unit; the inverter unit is used to process the electric energy generated by the motor to obtain direct current; The DC-DC unit is used to convert high voltage into a voltage matching the energy storage unit, and charge and discharge the energy storage unit; the energy storage unit is used to store energy; the circuit of the inverter unit is based on a discrete insulated gate bipolar type Transistor IGBT design; the circuit is composed of six fast recovery diodes VD1~VD6 and six IGBTs Q1~Q6 connected in parallel. The PWM signal generated by the PWM module in the control circuit controls the IGBT on and off, and finally converts the input sine wave into DC or Convert direct current into sine waves of appropriate frequency;

The electrical components such as frequency converters and PLCs are located in the control cabinet and are used to drive the permanent magnet synchronous reducer to drive the polished rod to reciprocate up and down in a set motion mode and a set stroke; its signal input end is connected to the sensor respectively. The signal output end is connected; its signal output end is connected to the signal input end of the braking mechanism respectively; its power supply input end is connected correspondingly to the power supply input end of the lightning surge protector and the external power supply output end;

Preferably, when the motor continuously operates for multiple power generation cycles and the electric energy stored in the energy storage unit reaches the upper limit of capacity, an alarm is triggered and the energy storage is stopped. At the same time, the drive control device controls the power electronic device to close and conduct the electric operation winding and Connections between power frequency grids;

Further, the transmission device at least includes a reducer 3. The reducer 3 adopts a permanent magnet synchronous reducer. Specifically, the output of the motor 5 is connected to the input end of the reducer 3. The reducer 3 The other end of the input shaft is connected to the brake 4; the brake 4 can be any one of drum brake, block brake, disc brake, and sleeve brake. In this embodiment, the disc brake 4 is preferably used. The disc brake consists of a brake disc, a holding brake mechanism, a handbrake mechanism and an electro-hydraulic pusher. The brake is normally open and can be braked according to instructions; during shutdown or power outage for maintenance and repair, manual braking and its self-locking mechanism can be used to brake, and no power supply is needed at this time.

As shown in Figures 4, 5, and 6, further, the flexible transmission member 7 includes at least a section of transmission steel belt. One end of the transmission steel belt is fixed and wound on the drum 2, and the other end of the transmission steel belt is connected to the drum 2. The load 10 is connected, or connected to one end of at least one steel wire rope 11 through a connector, and the other end of the steel wire rope 11 is connected to the load 10;

Various flexible transmission mechanisms are formed through the cooperation of the transmission steel belt and the steel wire rope 11;

Specifically, as shown in Figure 4, in the first transmission mode, the transmission is directly carried out by the transmission steel belt, that is, one end of the transmission steel belt is fixed and wound on the drum 2, and the other end is driven along one side of the guide 9 The guide structure of the guide member 9 reaches the other side of the guide member 9, and the other end of the transmission steel belt is connected to the load 10;

As shown in Figure 5, in the second transmission mode, one end of the transmission steel belt is fixed and wound on the drum 2, and the other end is connected to one end of a steel wire rope 11 through a connector. The other end of the steel wire rope 11 is connected by a guide 9 One side guides the structure along the guide 9 to the other side of the guide 9 and is connected to the load 10;

As shown in Figure 6, in the third transmission mode, one end of the transmission steel belt is fixed and wound on the drum 2, the other end is connected to one end of the two steel wire ropes 11 through a connector at the same time, and the other ends of the two steel wire ropes 11 are simultaneously connected. From one side of the guide member 9 to the guide structure to the other side of the guide member 9, connected to the load 10;

As shown in Figures 4, 5, and 6, further, the guide member 9 includes at least one rigid pulley. The outer circumferential surface of the rigid pulley is provided with at least one ring of grooves to form a guide structure. The flexible transmission member 7 is connected with the The groove fit;

As shown in Figure 10, corresponding to the first transmission mode of the flexible transmission member 7, the guide member 9 can be directly a rigid pulley, and the outer peripheral surface of the rigid pulley is provided with a circle of grooves to cooperate with the steel belt; One end of the transmission steel belt is provided with a lock 71 to be connected to the transmission device, and the other end is provided with a connector 74 to connect to the polished rod. The lock is a strip-shaped plate with a groove in the middle of one end. One end of the steel strip is inserted into it and fixed together through a riveting process. The connector is a hollow plate with one end similar to a lock and a groove in the middle. The other end of the steel strip is inserted into it and fixed together through a riveting process. The other end of the connector is similar to a beam when used, with a hole in the middle and a polished rod passing through it. , put the polished pole clamp on the polished pole above the beam and fix it, and the polished pole will be hung on the beam. When the steel belt runs up and down, it drives the polished rod to move up and down together.

Corresponding to the second transmission mode of the flexible transmission member 7, the guide member 9 has been further improved. The guide member 9 includes a rigid pulley, and the outer circumferential surface of the rigid pulley is provided with a groove. A circle of plastic composite parts is provided, and a circle of wire grooves is provided on the plastic composite parts to cooperate with the steel wire rope 11;

Corresponding to the third transmission mode of the flexible transmission member, the guide member 9 includes two rigid pulleys. The two rigid pulleys are arranged on a rotating shaft and are rotationally connected to the top of the tower 6 through the rotating shaft. The outer circumferential surface of the rigid pulley is provided with a circle of grooves, and the groove is provided with a circle of plastic composite parts. The plastic composite parts are provided with a circle of wire grooves to cooperate with the corresponding one of the steel wire ropes 11. It can also be used by The outer circumferential surface of one of the rigid pulleys is provided with two rings of grooves. Each ring of the grooves is provided with a ring of plastic composite parts. The plastic composite parts are provided with a ring of wire grooves to cooperate with the corresponding one of the steel wire ropes 11. ;

As shown in Figures 1, 2, and 3, further, the guide 9 is installed on the top of the tower 6 through the guide bracket 8 or directly installed on the top of the tower 6;

Further, the movable connection between the guide bracket 8 and the tower 6;

Specifically, the guide bracket 8 and the tower 6 are hingedly fixed or slidably fixed in a rotatable manner; when the well is being repaired, the guide can be rotated upward 180° or laterally toward the central axis of the tower 6 Move in direction to make room for well repair;

As shown in Figures 1, 5, and 7, at the same time, the tower 6 can adopt an integral structure or a detachable layered structure; such as a single I-beam tower, an I-beam combined integrated tower, or an angle steel combination. In the integrated tower, the angle steel combination integrated tower can be integrally welded, or multi-section single-section brackets can be combined through bolted connections to facilitate disassembly and installation;

As shown in Figures 1 and 7, the corresponding base 1 can be an integral base 1 or a split base 1. The integral base 1 can be welded with I-beam and tic-beam steel to form an integral base 1, or multiple pieces can be used. The steel plate is connected to the split base 1 through bolts, nuts and connecting plates;

As shown in Figure 8, the base is provided on the guide plate 13. The guide plate 13 is provided with a guide rail that slides with the base 1. The guide plate 13 is provided with a hydraulic cylinder 12 on the side away from the load 10. The piston rod of the hydraulic cylinder 12 is connected to one side of the base 1;

As shown in Figure 9, the base 1 is provided with a vertically arranged hydraulic cylinder 12. The bottom of the hydraulic cylinder 12 is hinged to the base 1; the guide bracket 8 passes through the side away from the load 10. The hinge shaft 16 is hinged on the tower 6 , and a slider 15 is provided at the bottom of the guide bracket 8 . The slider 15 is connected to the piston rod of the hydraulic cylinder 12 through a connecting rod 14 .

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (9)

1. An electrically balanced flexible traction oil pumping unit, characterized in that it includes Base, used to support various components; Tower, set on the base; The main machine is arranged on the base on one side of the tower. The main machine at least includes a motor and a controller, and the controller is electrically connected to the motor; A guide member installed on the top of the tower; Flexible transmission member, the flexible transmission member moves from one side of the guide member to the other side of the guide member along the guide structure of the guide member, one end of the flexible transmission member is connected to the load, and the other end of the flexible transmission member passes through the transmission device Connected to the motor; during the upstroke stage of the load, the flexible transmission member drives the load to lift; during the downstroke stage of the load, the flexible transmission member drives the motor to generate electricity; Energy storage device, the energy storage device is electrically connected to the motor and the controller. The energy storage device stores the electric energy generated by the motor during the down stroke stage of the load; and provides electric energy to the motor during the up stroke stage of the load. The load is lifted through the flexible transmission part. 2. An electrically balanced flexible traction oil pumping unit according to claim 1, characterized in that the motor is a permanent magnet motor, and the motor rotates forward and reverse alternately during operation. 3. An electrically balanced flexible traction pumping unit as claimed in claim 1, characterized in that the controller at least includes a PLC control unit, a frequency converter and an energy storage device thereof; the energy storage device includes an inverter unit, a DC- DC unit and energy storage unit; the inverter unit shares the inverter unit in the frequency converter; the inverter unit is electrically connected to the motor and DC-DC unit respectively, and the energy storage unit is electrically connected to the DC-DC unit; the inverter unit is used The electric energy emitted by the motor is processed to obtain direct current; the DC-DC unit is used to convert the high voltage into a voltage matching the energy storage unit and charge and discharge the energy storage unit. 4. An electrically balanced flexible traction oil pumping unit according to any one of claims 1 to 3, characterized in that the flexible transmission member includes a transmission steel belt. 5. An electrically balanced flexible traction oil pumping unit according to claim 4, characterized in that one end of the transmission steel belt is connected to the load, and the other end is connected to the transmission device. 6. An electrically balanced flexible traction oil pumping unit according to claim 4, characterized in that the flexible transmission member further includes at least one steel wire rope, and one end of the transmission steel belt is connected to one end of at least one steel wire rope through a connector. The other end of the steel wire rope is connected to the load, and the other end of the transmission steel belt is connected to the transmission device. 7. An electrically balanced flexible traction oil pumping unit according to claim 5, characterized in that the guide member includes at least one rigid pulley, and the outer circumferential surface of the rigid pulley is provided with at least one ring of grooves and the flexible pulley. Matching transmission parts. 8. An electrically balanced flexible traction oil pumping unit according to claim 6, characterized in that the guide member includes at least one rigid pulley, and the outer circumferential surface of the rigid pulley is provided with at least one ring of grooves, and the grooves There is at least one circle of plastic composite parts in the groove, and at least one ring of wire grooves is provided on the plastic composite parts to cooperate with the steel wire rope. 9. An electrically balanced flexible traction oil pumping unit according to claim 1, characterized in that the guide member is movably connected to the tower through a guide bracket.