Tooth-shaped load belt direct-drive electric control reversing pumping unit

Abstract

The invention relates to the technical field of oil pumping units, and discloses a tooth-shaped load belt direct-drive electric control reversing oil pumping unit which comprises a permanent magnet motor device, synchronous pulleys, an auxiliary guide system and a tooth-shaped load belt, and the whole device adopts the permanent magnet motor device to directly drive the tooth-shaped load belt through the double synchronous pulleys; the permanent magnet efficient synchronous motor is adopted for direct driving, one-stage transmission is reduced compared with a conventional electric control reversing oil pumping unit, the transmission efficiency is improved by about 5%-6%, meanwhile, the synchronous belt is adopted as a load belt, the transmission precision and the transmission efficiency are improved, the transmission efficiency is improved by about 6%-7%, and the overall efficiency of the whole machine is improved by about 10%-12%; the toothed belt is adopted to replace an original flat belt for transmission, the slipping phenomenon of an original load belt is thoroughly eliminated, the phenomenon of well stopping due to slipping is reduced, crude oil production of an oil field and an oil well is more stable, a roller structure is removed, maintenance points are reduced, the weight of the whole machine is reduced by 2 tons, and equipment transportation is more convenient.

Description

Technical Field

[0001] This invention relates to the field of oil pumping unit technology, and more specifically to a toothed load belt direct-drive electrically controlled commutating oil pumping unit. Background Technology

[0002] In the global energy system, oil has always been one of the core power sources supporting the operation of modern industrial civilization. Even with the rapid development of renewable energy, the demand for oil in transportation, chemical raw materials, and power supply remains stable, and its strategic position is difficult to replace in the short term. Oil pumping units, as key equipment for "wellbore fluid extraction" in the oil extraction process, are like the "heart" of an oil field, undertaking the important mission of transporting crude oil from underground reservoirs to the surface gathering and transportation system. According to industry statistics, globally, approximately 70% of oil wells, due to insufficient self-flowing capacity or entering the mid-to-late stages of development, rely on oil pumping units to complete extraction operations. The technological level of these units directly determines the oil field's extraction efficiency, production costs, and environmental protection level.

[0003] Current technological limitations: In the later stages of crude oil production and development, the commonly used equipment for artificial lift is the pumping unit. Its basic principle is to rely on the reciprocating motion of the pumping unit to drive the plunger of the downhole pump, thus transporting crude oil from underground to the surface. However, current tower pumping units use a two-stage transmission: the motor drives a drum via a synchronous belt for reduction, and the drum drives a load belt, relying on friction with the drum to drive the load belt in a reciprocating motion. This two-stage transmission method has low transmission efficiency, and the slippage loss between the load belt and the drum results in low mechanical transmission efficiency for the pumping unit. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a toothed load belt direct drive electrically controlled reversing pumping unit to solve the problems existing in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a toothed load belt direct-drive electrically controlled reversing pumping unit, comprising a permanent magnet motor device, synchronous pulleys, an auxiliary guiding system and a toothed load belt. The overall device adopts a permanent magnet motor device to directly drive the toothed load belt through double synchronous pulleys, realizing primary transmission and eliminating drum friction loss. The permanent magnet motor device is electrically controlled for reversing to realize the pumping action.

[0006] Furthermore, the auxiliary guiding system includes a guide bearing seat fixedly installed on the top of the upper platform. An auxiliary shaft is movably sleeved on the inner wall of the guide bearing seat. An auxiliary pulley is fixedly installed on the side of the auxiliary shaft. The side of the auxiliary pulley is movably connected to the side of the toothed load belt. A retaining ring is fixedly installed on each side of the auxiliary pulley. A brake wheel is movably sleeved on the side of the auxiliary shaft. A brake wheel retaining ring is fixedly installed on the inner wall of the brake wheel. An encoder is fixedly installed on the side of the guide bearing seat. The auxiliary guiding system has a symmetrical structure, with the guide bearing seat, auxiliary pulley, and retaining ring symmetrically distributed on both sides of the brake wheel.

[0007] Furthermore, the device includes an upper platform, a permanent magnet motor fixedly mounted on the top of the upper platform, an auxiliary guide system fixedly mounted on the top edge of the upper platform, a toothed load belt movably connected to the side of the permanent magnet motor, the side of the toothed load belt movably connected to the side of the auxiliary guide system, a suspension rod fixedly mounted at one end of the toothed load belt, a counterweight box fixedly mounted at the other end of the toothed load belt, a bracket fixedly mounted at the bottom of the upper platform, a ladder fixedly mounted at the bottom of the upper platform, guide wheels fixedly mounted on the inner wall of the bracket, and the counterweight box movably sleeved on the inner wall of the bracket. It also includes a pumping unit base, the top of which is fixedly connected to the bottom of the bracket, a forward moving mechanism fixedly mounted on the inner wall of one end of the pumping unit base, a rear moving mechanism fixedly mounted on the inner wall of the other end of the pumping unit base, a support rod movably connected to the top of the pumping unit base, and the other end of the support rod movably connected to the side of the bracket.

[0008] Furthermore, the permanent magnet motor device includes a synchronous motor and two synchronous pulleys fixedly installed on the top of the upper platform. A synchronous pulley is fixedly installed on each side of the synchronous motor. A pressure cover is fixedly installed on the side of the synchronous pulley. The synchronous pulley is located between the synchronous motor and the pressure cover. The side of the synchronous pulley is movably connected to the side of the toothed load belt.

[0009] The technical effects and advantages of this invention are as follows: This invention uses a permanent magnet high-efficiency synchronous motor for direct drive, which reduces one stage of transmission compared to conventional electrically controlled reversing pumping units, increasing transmission efficiency by about 5% to 6%. At the same time, the use of a synchronous belt as a load belt improves transmission accuracy and efficiency, increasing transmission efficiency by about 6% to 7%, and the overall efficiency of the machine by about 10% to 12%.

[0010] This invention completely eliminates the slippage of the original load belt by using a toothed belt instead of the original flat belt drive, reduces the occurrence of slippage and well shutdown, and makes the crude oil production of oil wells in the oil field more stable.

[0011] This invention employs an auxiliary guiding system, which allows for adjustment of the gap between the guide wheel and the guide rail in both the lateral and longitudinal directions. This results in a more precise and reasonable fit between the guide wheel and the guide rail, reducing frictional noise between the guide wheel and the guide rail by approximately 3dB and improving the quietness of the pumping unit.

[0012] This invention reduces maintenance points by eliminating the roller structure and lowers the overall weight by 2 tons, making the equipment easier to transport. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the permanent magnet motor device of the present invention; Figure 3 This is a side view of the permanent magnet motor device of the present invention; Figure 4 This is a schematic diagram of the auxiliary guidance system structure of the present invention.

[0014] The attached figures are labeled as follows: 1. Permanent magnet motor device; 101. Synchronous motor; 102. Synchronous pulley; 103. Pressure cap; 2. Auxiliary guide system; 21. Guide bearing seat; 22. Auxiliary pulley; 23. Retaining ring; 24. Auxiliary shaft; 25. Brake wheel; 26. Brake wheel retaining ring; 27. Encoder; 3. Upper platform; 4. Toothed load belt; 5. Suspension rod device; 6. Bracket; 7. Ladder; 8. Guide wheel; 9. Counterweight box; 10. Pumping unit base; 11. Front moving mechanism; 12. Rear moving mechanism; 13. Support rod. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The toothed load belt direct drive electrically controlled commutating pumping unit involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Reference Figures 1 to 4 The present invention provides a toothed load belt direct drive electrically controlled reversing pumping unit, including a permanent magnet motor device 1, a synchronous pulley 102, an auxiliary guiding system 2 and a toothed load belt 4. The overall device adopts a permanent magnet motor device 1 to directly drive the toothed load belt 4 through the double synchronous pulleys 102 to achieve primary transmission and eliminate roller friction loss. The permanent magnet motor device 1 is electrically controlled to reverse the direction to realize the pumping action.

[0017] In this embodiment, a toothed load belt 4 is used as the drive belt for the electrically controlled reversing pumping unit. Through the toothed load belt 4 and the pumping unit's toothed load belt auxiliary guide system, the suspension rod device 5 is directly driven to reciprocate up and down. The toothed load belt 4 is a steel wire toothed load belt, designed to improve tensile strength and extend belt service life. The auxiliary guiding system 2 includes a guide bearing seat 21 fixedly installed on the top of the upper platform 3. An auxiliary shaft 24 is movably sleeved on the inner wall of the guide bearing seat 21. An auxiliary pulley 22 is fixedly installed on the side of the auxiliary shaft 24. The side of the auxiliary pulley 22 is movably connected to the side of the toothed load belt 4. A retaining ring 23 is fixedly installed on each side of the auxiliary pulley 22. A brake wheel 25 is movably sleeved on the side of the auxiliary shaft 24. A brake wheel retaining ring 26 is fixedly installed on the inner wall of the brake wheel 25. An encoder 27 is fixedly installed on the side of the guide bearing seat 21. The auxiliary guiding system 2 has a symmetrical structure, with the guide bearing seat 21, auxiliary pulley 22, and retaining ring 23 symmetrically distributed on both sides of the brake wheel 25.

[0018] In this embodiment, the pumping unit is equipped with an auxiliary guiding system to increase the vertical distance between the toothed load belt 4 and the frame 6, ensuring that the minimum distance between the wellhead and the pumping unit frame 6 meets the requirements. The auxiliary guiding system consists of two bearing seats 21, two auxiliary synchronous pulleys 22, and an auxiliary shaft 24. The keyways and tooth azimuth angles of the two auxiliary synchronous pulleys 22 are identical. The device includes an upper platform 3, on the top of which a permanent magnet motor device 1 is fixedly installed. An auxiliary guide system 2 is fixedly installed on the top edge of the upper platform 3. A toothed load belt 4 is movably connected to the side of the permanent magnet motor device 1. The side of the toothed load belt 4 is movably connected to the side of the auxiliary guide system 2. A suspension rod device 5 is fixedly installed at one end of the toothed load belt 4, and a counterweight box 9 is fixedly installed at the other end. A bracket 6 is fixedly installed at the bottom of the upper platform 3, and a ladder 7 is fixedly installed at the bottom of the upper platform 3. A guide wheel 8 is fixedly installed on the inner wall of the bracket 6. The counterweight box 9 is movably sleeved on the inner wall of the bracket 6. The device also includes a pumping unit base 10, on the top of which is fixedly connected to the bottom of the bracket 6. A front moving mechanism 11 is fixedly installed on the inner wall of one end of the pumping unit base 10, and a rear moving mechanism 12 is fixedly installed on the inner wall of the other end. A support rod 13 is movably connected to the top of the pumping unit base 10, and the other end of the support rod 13 is movably connected to the side of the bracket 6.

[0019] The permanent magnet motor device 1 includes a synchronous motor 101 and two synchronous pulleys 102 fixedly installed on the top of the upper platform 3. A synchronous pulley 102 is fixedly installed on each side of the synchronous motor 101. A pressure cover 103 is fixedly installed on the side of the synchronous pulley 102. The synchronous pulley 102 is located between the synchronous motor 101 and the pressure cover 103. The side of the synchronous pulley 102 is movably connected to the side of the toothed load belt 4.

[0020] The working principle of this invention is as follows: Synchronous motor 101 is started, which drives synchronous pulley 102 to rotate. Synchronous pulley 102 drives toothed load belt 4 located on it to move. The movement of toothed load belt 4 drives auxiliary pulley 22 to rotate. Auxiliary pulley 22 drives auxiliary shaft 24 to rotate on the inner wall of guide bearing seat 21. Toothed load belt 4 drives suspension device 5 to move downwards. The counterweight box 9 located at the other end of toothed load belt 4 is lifted to a high position. When suspension device 5 reaches its lowest point and counterweight box 9 reaches its highest point, synchronous motor 101 reverses, and suspension device 5 moves upwards. Counterweight box 9 also moves downwards due to gravity, pulling suspension device 5 upwards. Suspension device 5 then extracts oil from the wellbore, completing the oil extraction operation.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications and variations made within the spirit and principles of the present invention, including but not limited to this embodiment, should be included within the protection scope of the present invention.

Claims

1. A toothed load belt direct-drive electrically controlled reversing pumping unit, comprising a permanent magnet motor (1), a synchronous pulley (102), an auxiliary guiding system (2), and a toothed load belt (4), characterized in that: The overall device uses a permanent magnet motor device (1) to directly drive the toothed load belt (4) through double synchronous pulleys (102) to achieve primary transmission and eliminate roller friction loss. The permanent magnet motor device (1) is electrically controlled to reverse the direction to achieve the oil pumping action.

2. The toothed load belt direct-drive electrically controlled commutating pumping unit according to claim 1, characterized in that: The auxiliary guiding system (2) includes a guide bearing seat (21) fixedly installed on the top of the upper platform (3). An auxiliary shaft (24) is movably sleeved on the inner wall of the guide bearing seat (21). An auxiliary pulley (22) is fixedly installed on the side of the auxiliary shaft (24). The side of the auxiliary pulley (22) is movably connected to the side of the toothed load belt (4). A retaining ring (23) is fixedly installed on each side of the auxiliary pulley (22). A brake wheel (25) is movably sleeved on the side of the auxiliary shaft (24). A brake wheel retaining ring (26) is fixedly installed on the inner wall of the brake wheel (25). An encoder (27) is fixedly installed on the side of the guide bearing seat (21). The auxiliary guiding system (2) has a symmetrical structure. The guide bearing seat (21), the auxiliary pulley (22), and the retaining ring (23) are symmetrically distributed on both sides of the brake wheel (25).

3. The toothed load belt direct-drive electrically controlled commutating pumping unit according to claim 1, characterized in that: The device includes an upper platform (3), on which a permanent magnet motor device (1) is fixedly installed. An auxiliary guide system (2) is fixedly installed on the top edge of the upper platform (3). A toothed load belt (4) is movably connected to the side of the permanent magnet motor device (1). The side of the toothed load belt (4) is movably connected to the side of the auxiliary guide system (2). A suspension device (5) is fixedly installed at one end of the toothed load belt (4), and a counterweight box (9) is fixedly installed at the other end of the toothed load belt (4). A bracket (6) is fixedly installed at the bottom of the upper platform (3). The bracket (6) is fixedly equipped with a ladder (7), and the inner wall of the bracket (6) is fixedly equipped with guide wheels (8). The counterweight box (9) is movably sleeved on the inner wall of the bracket (6). The bracket also includes a pumping unit base (10). The top of the pumping unit base (10) is fixedly connected to the bottom of the bracket (6). A front moving mechanism (11) is fixedly installed on the inner wall of one end of the pumping unit base (10). A rear moving mechanism (12) is fixedly installed on the inner wall of the other end of the pumping unit base (10). A support rod (13) is movably connected to the top of the pumping unit base (10). The other end of the support rod (13) is movably connected to the side of the bracket (6).

4. The toothed load belt direct-drive electrically controlled commutating pumping unit according to claim 1, characterized in that: The permanent magnet motor device (1) includes a synchronous motor (101) and two synchronous pulleys (102) fixedly installed on the top of the upper platform (3). A synchronous pulley (102) is fixedly installed on each side of the synchronous motor (101). A pressure cover (103) is fixedly installed on the side of the synchronous pulley (102). The synchronous pulley (102) is located between the synchronous motor (101) and the pressure cover (103). The side of the synchronous pulley (102) is movably connected to the side of the toothed load belt (4).

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