CN205638381U - A beam-type oil production device directly driven by a switched reluctance motor for a pumping unit - Google Patents

Abstract

The utility model provides a beam-type oil extraction device directly driven by a switched reluctance motor, which comprises a bracket, a beam arranged at the top of the bracket, a donkey head arranged at one end of the beam, and a crane arranged at the lower end of the donkey head. The rope also includes a switched reluctance motor and a switched reluctance motor control cabinet. The other end of the beam is provided with a beam hook, and the beam hook is connected to a drum through a cable. The drum is arranged directly below the beam hook. The cable is wound on the drum. The utility model removes the belt, the reduction box, and the connecting rod transmission mechanism, studies the driving mode of the direct connection between the motor and the beam of the pumping unit through the drum, uses the switched reluctance motor as the power, and exerts its high motor efficiency, wide high-efficiency range, and It has the advantages of large starting torque, low starting current, high power factor, controllable speed, and forward and reverse rotation. At the same time, the motor will run at a low speed without the gearbox, which will greatly reduce the energy consumption of the system.

Description

A beam-type oil production device directly driven by a switched reluctance motor for a pumping unit

technical field

The utility model belongs to the technical field of oil production of oil pumping wells in oil fields, in particular to a beam-type oil production device directly driven by a switched reluctance motor for a pumping unit.

Background technique

The beam pumping unit is the ground-driven equipment of the rod oil production system. It has the advantages of simple structure, strong adaptability, and convenient operation and maintenance. It is used in more than 90% of domestic oil fields. The beam pumping unit is mainly composed of a donkey head, a beam, a connecting rod, a crank, a reduction box and an electric motor. When the pumping unit is working, the motor transmits its high-speed rotation to the input shaft of the reduction box through the belt, and the output shaft is driven by the gear of the reduction box, and the output shaft drives the crank for low-speed rotation. The crank pulls the beam to swing through the connecting rod, and the donkey head swings up and down with the beam, driving the oil well pump to reciprocate up and down to complete the oil recovery process.

But the reduction box is used as a reduction mechanism, and the oil leakage phenomenon and the gear movement damage caused by casting defects often occur during operation, which affects the normal production of the oil well and the service life of the pumping unit. Secondly, as the transmission mechanism between the motor and the reduction box, the belt also has many disadvantages. For example, when the motor encounters rainy and snowy weather or the load increases, the belt is prone to slipping, lost rotation, and breakage in severe cases, which will increase the labor intensity of workers. Large, high operating cost, low production rate; when the motor is running, the output shaft is affected by the radial belt tension, which increases mechanical loss and energy loss. In addition, belts, reduction boxes and connecting rods are the moving parts of the transmission, which must consume energy, which reduces the energy transfer efficiency of the motor and increases the energy consumption of the pumping unit.

Utility model content

The purpose of the utility model is to overcome the above-mentioned problems of the existing beam pumping unit and reduce mechanical loss and energy loss.

For this reason, the utility model provides a beam-type oil extraction device directly driven by a switched reluctance motor, including a bracket, a beam mounted on the top of the bracket, a donkey head mounted on one end of the beam, and a donkey head mounted on the donkey head. The sling at the lower end also includes a switched reluctance motor and a switched reluctance motor control cabinet, the other end of the beam is provided with a beam hook, and the beam hook is connected to a roller through a cable, and the roller is arranged directly below the beam hook , the cable is wound on the drum;

The drum includes a drum shaft and drum rollers, the drum shaft is connected to the output shaft of the switched reluctance motor, and the switched reluctance motor is connected to the switched reluctance motor control cabinet.

A beam balance block is arranged on the beam, and the beam balance block is located at one side of the beam hook.

A support base is provided at the bottom of the support, and the switched reluctance motor and the roller are arranged on the support base.

The output shaft of the switched reluctance motor is connected with the drum shaft through a coupling.

The number of strokes and the stroke of the oil production device are respectively adjusted through the switch reluctance motor control cabinet to adjust the speed of the switch reluctance motor and the forward and reverse conversion time.

The beneficial effects of the utility model are: the switched reluctance motor provided by the utility model directly drives the beam-type oil extraction device of the pumping unit, removes the belt, the reduction box, and the connecting rod transmission mechanism, and passes the motor through the drum and the pumping unit. Research on the driving method of beam direct connection, using switched reluctance motor as the power, to take advantage of its advantages of high motor efficiency, wide efficiency range, large starting torque, low starting current, high power factor, controllable speed and forward and reverse rotation ; At the same time, remove the gearbox, the motor will run at a low speed, which will greatly reduce the energy consumption of the system.

Further details will be described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic diagram of a drum driven by a switched reluctance motor;

Fig. 3 is a schematic diagram of an existing beam pumping unit.

In the figure: 1. Switched reluctance motor control cabinet; 2. Donkey head; 3. Traveling beam 3; 4. Traveling beam balance block; 5. Traveling beam hook; 6. Cable; 7. Roller; 8. Switched reluctance motor ;9, rope suspension device; 10, bracket; 11, bracket base; 12, suspension rope; 13, switched reluctance motor output shaft; 14, coupling; 15, drum shaft; 16, drum roller; 17, beam; 18, connecting rod; 19, crank; 20, reduction box; 21, electric motor; 22, brake.

detailed description

Example 1:

This embodiment provides a beam-type oil extraction device directly driven by a switched reluctance motor, comprising a bracket 10, a beam 3 arranged at the top of the bracket 10, a donkey head 2 arranged at one end of the beam 3 and a donkey head 2 arranged at the top of the bracket 10 The sling 12 at the lower end of the donkey head 2 also includes a switched reluctance motor 8 and a switched reluctance motor control cabinet 1, the other end of the beam 3 is provided with a beam hook 5, and the beam hook 5 is connected to the drum through a cable 6 7. The drum 7 is located directly below the beam hook 5, and the cable 6 is wound on the drum 7;

The drum 7 includes a drum shaft 15 and drum rollers 16 , the drum shaft 15 is connected to the output shaft 13 of the switched reluctance motor, and the switched reluctance motor 8 is connected to the switched reluctance motor control cabinet 1 .

The lower end of the suspension rope 12 of the oil production device is connected to the sucker rod of the oil pump through the rope hanger 9. During normal operation, the switched reluctance motor 8 transmits power to the drum 7, and the forward and reverse rotation of the drum 7 completes the retraction and release process of the cable 6, driving the The beam 3 and the donkey head 2 realize the kowtow action, thereby pulling the sucker rod to realize the reciprocating motion of the oil pump, realizing the pumping process, and lifting the bottom liquid to the ground.

Example 2:

On the basis of Embodiment 1, this embodiment provides a beam-type oil production device directly driven by a switched reluctance motor, the beam 3 is provided with a beam balance block 4, and the beam balance block 4 is located at one side of the beam hook 5.

Due to the different loads on the up and down strokes during the operation of the oil extraction device, the load on the up and down strokes of the motor is uneven, resulting in waste of electric energy, reducing the efficiency of the motor, shortening the service life of the motor, and affecting the normal operation of the machine, rod and pump. , so the position of the beam balance weight 4 can be judged by measuring the peak current of the up and down stroke of the oil production unit. By adjusting the position of the balance block of the oil production unit, the purpose of motor load balance is achieved to ensure the smooth operation of the oil production unit.

Example 3:

On the basis of Embodiment 1, this embodiment provides a beam-type oil production device directly driven by a switched reluctance motor as shown in Figure 1, the bottom of the support 10 is provided with a support base 11, the The switched reluctance motor 8 and the roller 7 are arranged on the support base 11 . The output shaft 13 of the switched reluctance motor is connected with the drum shaft 15 through a coupling 14 .

As shown in Figures 1 and 2, the switched reluctance motor 8 and the drum 7 are vertically placed on the base of the pumping unit, the output shaft 13 of the switched reluctance motor is opposite to the drum shaft 15, and the middle is connected by a coupling 14. The cable 6 on the drum 7 is connected with the beam hook 5 at the bottom of the beam 3 . When the oil production device is working, the switched reluctance motor 8 transmits power to the drum shaft 15 through the coupling 14, and the rotation of the drum shaft 15 drives the drum 7 to rotate. When the motor rotates forward, the cable 6 is wound on the drum 7, and the beam 3 is Drag down, complete oil pumping up stroke, when motor reverses, drum 7 decontrols cable 6, and beam 3 rises, has realized oil pumping down stroke. Such repeated positive and negative rotations realize the reciprocating motion of the sucker rod and the pumping oil production of the oil well pump; the pumping strokes can be realized by setting the speed in the switched reluctance motor control cabinet 1, and the adjustment stroke can be adjusted The switched reluctance motor 8 is controlled by forward and reverse time.

Existing beam pumping unit as shown in Figure 3 is made up of donkey head 2, beam 3, connecting rod 18, crossbeam 17, crank 19, reduction box 20, motor 21, brake 22 and other parts. When the pumping unit is working, after the motor 21 is decelerated by the belt reduction box 20, the crank 19 connecting rod 18 mechanism converts the rotational motion of the output shaft of the reduction box 20 into the reciprocating motion of the donkey head 2, thereby driving the oil well pump to do up and down reciprocating motion, completing Oil recovery process. Compared with the existing beam pumping unit, the utility model has the following beneficial effects:

1. The belt drive, reduction box 20 and connecting rod 18 are canceled, and the pure torque output of the motor 21 improves the transmission efficiency of the motor 21, greatly reduces the speed of the motor 21, reduces the internal friction of the motor 21, and improves the ground level of the machine mining system. efficiency;

2. The switched reluctance motor 8 is used as the power, which reduces the operating current, active and reactive power of the motor, and reduces the energy loss of the motor; at the same time, the motor is equipped with over-current, over-voltage and overload protection to ensure safe and reliable operation;

3. The switch reluctance motor control cabinet is controlled by a microcomputer, which can carry out intelligent speed regulation operation according to the load change of the pumping unit, which is convenient for parameter adjustment of the pumping unit. Adjustment of times and strokes.

4. It is no longer necessary to carry out work such as belt replacement and gearbox 20 maintenance, which reduces the work intensity and operating costs, ensures the production time rate, reduces the mechanical loss of the ground system, and makes the system operation safer and more reliable.

The components and structures not described in detail in this embodiment belong to the known components and commonly used structures in this industry. The switched reluctance motor control cabinet belongs to the prior art, and will not be described here one by one.

The above examples are only illustrations of the utility model, and do not constitute a limitation to the protection scope of the utility model. All designs identical or similar to the utility model all belong to the protection scope of the utility model.

Claims (5)

1. A switched reluctance motor directly drives a pumping unit beam-type oil production device, including a bracket (10), a beam (3) set on the top of the bracket (10), and a donkey set at one end of the beam (3) The head (2) and the sling (12) arranged at the lower end of the donkey head (2) are characterized in that: it also includes a switched reluctance motor (8) and a switched reluctance motor control cabinet (1), and the beam (3 ) is provided with a beam hook (5) at the other end, and the beam hook (5) is connected to a roller (7) through a cable (6). The cable (6) is wound on the drum (7); The drum (7) includes a drum shaft (15) and a drum roller (16), the drum shaft (15) is connected to the output shaft (13) of the switched reluctance motor, the switched reluctance motor (8) and the switched magnetic Connect to the motor control cabinet (1). 2. A switched reluctance motor according to claim 1, which directly drives the pumping unit beam-type oil production device, characterized in that: the beam (3) is provided with a beam balance block (4), the The beam balance weight (4) is located on one side of the beam hook (5). 3. A switched reluctance motor according to claim 1 or 2, which directly drives the pumping unit beam type oil production device, characterized in that: the bottom of the support (10) is provided with a support base (11), the The switched reluctance motor (8) and the roller (7) are arranged on the support base (11). 4. A switched reluctance motor according to claim 1 or 2, which directly drives the pumping unit beam type oil production device, characterized in that: the output shaft (13) of the switched reluctance motor passes through a coupling (14 ) is connected with the roller shaft (15). 5. A switched reluctance motor according to any one of claims 1 or 2, which directly drives the pumping unit beam type oil production device, characterized in that: the strokes and strokes of the oil production device are respectively passed through the switched reluctance The motor control cabinet (1) adjusts the rotating speed of the switched reluctance motor (8) and the forward and reverse conversion time.