Pumping unit using output circulation forward and reverse rotation device

Abstract

A pumping unit using an output circulation forward and reverse rotation device belongs to the field of oil field equipment and comprises an actuating mechanism and the output circulation forward and reverse rotation device, and the actuating mechanism comprises a derrick, a bearing assembly, a horse head, a cross beam, an arc-shaped rack, a gear, a gear shaft, a balance weight, a well rod, a well rod cable and a balance weight cable; the output circulation forward and reverse rotation device is fixed together with a derrick of the execution mechanism through a rack; the middle of the beam is hinged to the top of a derrick through a bearing assembly, the two ends of the beam are fixed to horseheads respectively, and cables of the two horseheads are connected with a well rod and a balance weight respectively. An arc-shaped rack is fixed to the lower end of the horse head and meshed with a gear, the gear is arranged on a gear shaft in a sleeved mode and rotates along with the gear shaft, and the gear shaft is hinged to a base connected with the derrick through a bearing and connected with an output shaft of the output circulation forward and reverse rotation device. The transmission efficiency can be improved by 30%-50%, the operation noise is low, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The invention belongs to the field of oil pumping units used in oil fields, and in particular relates to an oil pumping unit using an output circulation forward and reverse rotation device. Background Art

[0002] Traditional oilfield pumping units, such as beam pumping units, generally have the following problems: Structural design defects: The crank-connecting rod mechanism is used, and the motor load fluctuates periodically, resulting in the "big horse pulling a small cart" phenomenon and serious waste of electricity.

[0003] Reactive power loss: The motor operates at a low power factor for a long time, generating a large amount of useless power.

[0004] Poor balance: Traditional balance blocks have low adjustment accuracy, which can easily cause system vibration and extra energy consumption.

[0005] Inefficient operation: When the operating conditions of the oil well change, such as insufficient fluid supply, the pumping unit still operates with fixed parameters, resulting in "empty pumping" or "overload".

[0006] CN11750057A discloses a device for outputting positive and negative rotation. Its structure and working principle are as follows: a sliding key input shaft drives a small bevel gear to rotate, the small bevel gear meshes with a large bevel gear, drives the large bevel gear to rotate, the large bevel gear drives the output pin gear to rotate, the pin gear meshes with a pin rack, when the pin rack goes down to the lowest position, the pin gear bypasses from the upper end of the pin rack, when the pin rack goes up to the highest position, the pin gear bypasses from the lower end of the pin rack, and then drives the pin rack to move up and down along the rack guide rail. That is, the pin gear rotates and reciprocates left and right, the pin gear always meshes with the pin rack and drives the pin rack to reciprocate up and down. The pin rack seat integrated with the pin rack moves up and down with the pin rack, the rack on the outer side of the pin rack seat moves up and down, the output gear meshed with the rack rotates forward and reversely, and the output shaft of the output gear outputs forward and reverse power.

[0007] During the reversing process, the output pin gear reciprocates left and right. At this time, the reversing input gearbox and the base reciprocate along the slide rail, and the small bevel gear reciprocates along the keyed input shaft with a key sleeve.

[0008] The transmission shaft at the outer end of the output pin gear is installed with a guide bearing, and the outer periphery of the inner surface of the pin rack seat is provided with a limit ring. The outer side of the guide bearing is in close contact with the limit ring, and the output pin gear coaxial with the guide bearing is tightly meshed with the pin rack, thereby ensuring that the output pin gear coaxial with the guide bearing is always meshed with the pin rack. At the same time, it limits the left and right reciprocating amplitude of the output pin gear and the reversing input gearbox, and also limits the up and down reciprocating amplitude of the pin rack.

[0009] The technical solution of CN11750057A has the following disadvantages: during the reversing process, the reversing input gearbox and the base reciprocate along the slide rail, which leads to severe wear and a short service life; the structure is complex, resulting in high manufacturing costs and inconvenient maintenance. Summary of the invention

[0010] The present invention aims at the problems existing in the background technology and provides an oil pumping unit using an output circulation forward and reverse device. The present invention perfectly solves the above problems existing in the traditional oil field oil pumping unit through a subversive change in structure.

[0011] A pumping unit using an output circulation forward and reverse rotation device comprises an actuator and the output circulation forward and reverse rotation device, wherein the actuator comprises a derrick, a bearing assembly, a donkey head, a crossbeam, an arc-shaped rack, a gear, a gear shaft, a counterweight, a well rod, a well rod cable, and a counterweight cable; the output circulation forward and reverse rotation device is fixed to the derrick of the actuator through a frame; the middle part of the crossbeam is hinged to the top of the derrick through a bearing assembly, and the two ends of the crossbeam are respectively fixed to the donkey head, a well rod cable is wound around one donkey head, and the lower end of the well rod cable is connected to the well rod; the counterweight cable is wound around the other donkey head, and the lower end of the counterweight cable is connected to the counterweight; the lower ends of the two donkey heads are respectively fixed to the two ends of the arc-shaped rack, the arc-shaped rack is meshed with the gear, the gear is sleeved on the gear shaft and rotates with the gear shaft, the gear shaft is hinged to a base connected to the derrick through a bearing, and the gear shaft is connected to the output shaft of the output circulation forward and reverse rotation device.

[0012] Working process of the present invention: The output shaft of the output circulation forward and reverse device drives the gear shaft and gear to rotate forward and reverse, the gear drives the arc-shaped rack to rotate back and forth, the arc-shaped rack drives the donkey head to swing up and down, and then drives the well rod up and down through the well rod cable to pump oil.

[0013] Beneficial technical effects of the present invention: 1. Through the meshing transmission of gears and column-type full-side racks, the problem of the traditional crank-connecting rod mechanism of the oil pump and the periodic fluctuation of the motor load, which leads to the "big horse pulling a small cart" phenomenon, can be solved, and the transmission efficiency can be improved by 30%-50%.

[0014] 2. The swing frame support structure has simple structure, low maintenance cost and long service life.

[0015] 3. The execution part has double donkey heads and gear rack transmission, which improves the transmission efficiency and avoids the high maintenance cost and heavy maintenance workload caused by belt transmission.

[0016] 4. The execution part has double donkey heads and the gear rack transmission runs smoothly with low environmental noise, reducing noise pollution.

[0017] 5. The execution part has double donkey heads, and the gear rack transmission runs smoothly. The drive motor load is stable and the load fluctuation is small, which is beneficial to energy saving and improving the service life of the motor.

[0018] 6. The execution part has double donkey heads and the gear rack transmission has high adjustment accuracy of the balance block, which can also achieve energy-saving effect.

[0019] The output cycle forward and reverse rotation device includes a primary input shaft, a primary input shaft bearing, a primary input gear, a swing frame, a swing frame support bearing, a primary output gear, a primary output shaft, a secondary output gear, a column-type full-side rack, a sliding plate, a frame, an inner slider assembly, a sliding column, a spur rack, an output gear, an output shaft and an output shaft bearing. The primary input gear is sleeved on the primary input shaft, and the primary input shaft is arranged in a hole at the lower end of the swing frame through the primary input shaft bearing. The lower end of the swing frame is fixed to the frame through the swing frame support bearing and a bearing seat. The primary output gear is meshed with the primary input gear, and the primary output gear is sleeved and fixed on the primary output shaft. Both ends of the primary output shaft are connected to the upper end of the swing frame through the primary output shaft bearing, and the inner end of the primary output shaft is sleeved with the secondary output gear. The column-shaped full-side rack is fixed on the side of the sliding plate, the secondary output gear on the primary output shaft is meshed with the column-shaped full-side rack, the primary output shaft end inside the secondary output gear is provided with an inner limit roller and an outer limit roller through a bearing, the sliding plate where the column-shaped full-side rack is located is provided with an inner limit baffle and an outer limit baffle, the inner limit baffle and the outer limit baffle follow the column-shaped full-side rack, the inner limit roller contacts the outer side of the inner limit baffle, the outer limit roller contacts the inner side of the outer limit baffle, the inner limit roller and the outer limit roller limit, so that the secondary output gear is tightly meshed with the column-shaped full-side rack; A spur rack is fixed on the other side of the sliding plate, and an inner slider assembly is fixed on the four corners of the sliding plate. Two sliding columns are fixed on the frame at vertical intervals, and a limiting slide groove is provided in the middle of the sliding column. The inner slider assembly on the same side of the sliding plate is slidably set in the limiting slide groove, and the limiting slide groove can limit the sliding plate from moving up and down linearly along the sliding column; the output gear is meshed with the spur rack, and the output gear sleeve is fixed on the output shaft, and the output shafts at both ends of the output gear are fixed to the frame through output shaft bearings and output shaft bearing seats.

[0020] The inner slider assembly comprises a limiting wheel set and a fixing plate. The limiting wheel set is hinged on the fixing plate. The limiting wheel set comprises a front and rear limiting wheel set and a left and right limiting wheel set.

[0021] Characteristics of the output circulation forward and reverse device: The transmission at the front of the output circulation forward and reverse device does not slide back and forth, but only swings left and right.

[0022] Working process and principle of output cycle forward and reverse device: The primary input shaft inputs power to rotate in one direction, and the primary input shaft drives the primary input gear to rotate, and the primary output gear meshing with the primary input gear rotates, and the secondary output gear on the same output shaft as the primary input gear rotates, and the column-type full-side rack meshing with the secondary output gear moves up and down driven by the secondary output gear, and at the same time, the secondary output gear swings left and right along the column-type full-side rack under the limit of the limit baffle, and at the same time, the secondary output gear drives the primary output shaft, the primary output gear, and the swing frame to swing around the primary input shaft; the column-type full-side rack drives the spur rack fixed with the sliding plate to move up and down, and the output gear meshing with the spur rack rotates forward and reversely, and the output gear sleeved on the output shaft drives the output shaft to output forward and reverse power.

[0023] Beneficial effects of output cycle forward and reverse device: The transmission composed of a primary input shaft, a primary input shaft bearing, a primary input gear, a swing frame, a swing frame support bearing, a primary output gear, a primary output shaft, and a secondary output gear swings left and right. Compared with the technical solution of CN11750057A, the output circulation forward and reverse device swings left and right, has a compact structure, and a long service life; the output circulation forward and reverse device has a simple overall structure, low manufacturing cost, and is easy to repair and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 for Figure 1 The enlarged schematic diagram of D in FIG. Figure 3 It is a front view of the present invention; Figure 4 It is a side view of the present invention; Figure 5 It is a first stereoscopic schematic diagram of the output circulation forward and reverse device of the present invention; Figure 6 It is a second stereoscopic schematic diagram of the output circulation forward and reverse device of the present invention; Figure 7 It is a third stereoscopic schematic diagram of the output circulation forward and reverse device of the present invention; Figure 8 It is a fourth stereoscopic schematic diagram of the output circulation forward and reverse device of the present invention; Fig. 9 It is a fifth stereoscopic schematic diagram of the output circulation forward and reverse device of the present invention; Fig.10 It is a sixth stereoscopic schematic diagram of the output circulation forward and reverse device of the present invention; Fig.11 This is a structural cross-sectional view of the cooperation between the inner slider assembly and the slide post of the output circulation forward and reverse reversing device of the present invention.

[0025] Fig.12 It is a cross-sectional view of the output circulation forward and reverse device of the present invention; Fig.13 yes Fig.12 A is an enlarged schematic diagram.

[0026] Fig.14 is another cross-sectional view of the output circulation forward and reverse device of the present invention; Fig.15 It is another cross-sectional view of the output circulation forward and reverse rotation device of the present invention.

[0027] In the figure: 1—first-stage input shaft; 2—first-stage input shaft bearing; 3—first-stage input gear; 4—swing frame; 5—swing frame support bearing; 6—first-stage output gear; 7—first-stage output shaft; 8—second-stage output gear; 9—column-type full-side rack; 10—sliding plate; 11—frame; 12—inner slider assembly; 121—limiting wheel set; 122—fixed plate; 1211—front and rear limiting wheel set; 1212—left and right limiting wheel set; 13—sliding column; 14—spur rack; 15—output gear; 16—output shaft; 17—output shaft bearing; 18—first-stage output shaft bearing; 19—outer limiting baffle; 191—inner limiting baffle; 20—outer limiting roller; 201—inner limiting roller; 21—limiting slide; 22—output shaft bearing seat; 23—derrick; 24—bearing assembly; 25—donkey head; 26—crossbeam; 27—arc-shaped rack; 28—gear; 29—gear shaft; 30—counterweight; 31—derrick; 32—derrick cable; 33—counterweight cable; B—actuator; C—output cycle forward and reverse device. DETAILED DESCRIPTION

[0028] See also Figures 1 to 4 As shown, a pumping unit using an output circulation forward and reverse device includes an actuator B and an output circulation forward and reverse device C. The actuator B includes a derrick 23, a bearing assembly 24, a donkey head 25, a crossbeam 26, an arc-shaped rack 27, a gear 28, a gear shaft 29, a counterweight 30, a well rod 31, a well rod cable 32, and a counterweight cable 33. The output circulation forward and reverse device B is fixed to the derrick 23 of the actuator B through a frame 11; the middle part of the crossbeam 26 is hinged to the top of the derrick 23 through the bearing assembly 24, and the two ends of the crossbeam 26 are fixed to the derrick 23 of the actuator B through the frame 11. The ends are respectively fixed to the donkey head 25, one donkey head 25 is wrapped with a well rod cable 32, and the lower end of the well rod cable 32 is connected to the well rod 31; the other donkey head 25 is wrapped with a counterweight cable 33, and the lower end of the counterweight cable 33 is connected to the counterweight 30; the lower ends of the two donkey heads 25 are respectively fixed to the two ends of the arc-shaped rack 27, the arc-shaped rack 27 is meshed with the gear 28, the gear 28 is sleeved on the gear shaft 29 and rotates with the gear shaft 29, the gear shaft 29 is hinged on the base connected to the derrick 23 through a bearing, and the gear shaft 29 is connected to the output shaft 16 of the output circulation forward and reverse device C.

[0029] Working process of the present invention: See also Figures 1 to 4 As shown, the output shaft 16 of the output circulation forward and reverse device C drives the gear shaft 29 and the gear 28 to rotate forward and reversely, the gear 28 drives the arc rack 27 to rotate back and forth, the arc rack 27 drives the donkey head 25 to swing up and down, and then drives the well rod 31 to move up and down through the well rod cable 32 to pump oil.

[0030] See also Figures 5 to 15 As shown, the output cycle forward and reverse rotation device C includes a primary input shaft 1, a primary input shaft bearing 2, a primary input gear 3, a swing frame 4, a swing frame support bearing 5, a primary output gear 6, a primary output shaft 7, a secondary output gear 8, a columnar full-side rack 9, a sliding plate 10, a frame 11, an inner slider assembly 12, a sliding column 13, a spur rack 14, an output gear 15, an output shaft 16 and an output shaft bearing 17, as shown in FIG. Fig.12 and Fig.13 As shown, the primary input gear 3 is sleeved on the primary input shaft 1, the primary input shaft 1 is set in the hole at the lower end of the swing frame 4 through the primary input shaft bearing 2, the lower end of the swing frame 4 is fixed to the frame 11 through the swing frame support bearing 5 and the bearing seat, the primary output gear 6 is meshed with the primary input gear 3, the primary output gear 6 is sleeved and fixed on the primary output shaft 7, both ends of the primary output shaft 7 are connected to the upper end of the swing frame 4 through the primary output shaft bearing 18, and the inner end of the primary output shaft 7 is sleeved with the secondary output gear 8; The columnar full-side rack 9 is fixed to the side of the sliding plate 10, the secondary output gear 8 on the primary output shaft 7 is meshed with the columnar full-side rack 9, the end of the primary output shaft 7 inside the secondary output gear 8 is provided with an inner limit roller 201 and an outer limit roller 20 through a bearing, and the sliding plate 10 where the columnar full-side rack 9 is located is provided with an inner limit baffle 191 and an outer limit baffle 19, the inner limit baffle 191 and the outer limit baffle 19 are shaped in the shape of the columnar full-side rack 9, the inner limit roller 201 contacts the outer side of the inner limit baffle 191, the outer limit roller 20 contacts the inner side of the outer limit baffle 19, the inner limit roller 201 and the outer limit roller 20 limit, so that the secondary output gear 8 is tightly meshed with the columnar full-side rack 9; A spur rack 14 is fixed to the other side of the sliding plate 10, and an inner slider assembly 12 is fixed to the four corners of the sliding plate 10. Two slide posts 13 are fixed on the frame 11 at intervals in the vertical direction. A limiting slide groove 21 is provided in the middle of the slide post 13. The inner slider assembly 12 on the same side of the sliding plate 10 is slidably arranged in the limiting slide groove 21. The limiting slide groove 21 can limit the sliding plate 10 from linearly moving up and down along the slide post 13. The output gear 15 is meshed with the spur rack 14 . The output gear 15 is sleeved and fixed on the output shaft 16 . The output shaft 16 at both ends of the output gear 15 is fixed on the frame 11 through output shaft bearings 17 and output shaft bearing seats 22 .

[0031] The inner slider assembly 12 comprises a limiting wheel set 121 and a fixing plate 122 . The limiting wheel set 121 is hinged on the fixing plate 122 . The limiting wheel set 121 comprises a front and rear limiting wheel set 1211 and a left and right limiting wheel set 1212 .

[0032] Features of output cycle forward and reverse device C: The transmission at the front of the output circulation forward and reverse rotation device C does not slide back and forth, but only swings left and right.

[0033] Working process and principle of output cycle forward and reverse device C: See also Figures 5 to 13 As shown, the primary input shaft 1 rotates with input power in one direction, the primary input shaft 1 drives the primary input gear 3 to rotate, the primary output gear 6 meshing with the primary input gear 3 rotates, the secondary output gear 8 of the same-level output shaft 7 as the primary input gear 3 rotates, the columnar full-side rack 9 meshing with the secondary output gear 8 moves up and down driven by the secondary output gear 8, and at the same time, the secondary output gear 8 swings left and right along the columnar full-side rack 9 under the limitation of the limiting baffle 19, and at the same time, the secondary output gear 8 drives the primary output shaft 7, the primary output gear 6, and the swing frame 4 to swing around the primary input shaft 1; the columnar full-side rack 9 drives the spur rack 14 fixed with the sliding plate 10 to move up and down, the output gear 15 meshing with the spur rack 14 rotates forward and reversely, and the output gear 15 sleeved on the output shaft 16 drives the output shaft 16 to output forward and reverse power.

[0034] Beneficial effects of output cycle forward and reverse device C: The transmission, which is composed of a primary input shaft, a primary input shaft bearing, a primary input gear, a swing frame, a swing frame support bearing, a primary output gear, a primary output shaft, and a secondary output gear, swings left and right. Compared with the technical solution of CN11750057A, the output circulation forward and reverse device C swings left and right, has a compact structure, and a long service life; the output circulation forward and reverse device C has a simple overall structure, low manufacturing cost, and is easy to repair and maintain.

Claims

1. An oil pumping unit using an output circulation forward and reverse rotation device, characterized in that: The invention comprises an actuator (B) and an output circulation forward and reverse rotation device (C). The actuator (B) comprises a derrick (23), a bearing assembly (24), a donkey head (25), a crossbeam (26), an arc-shaped rack (27), a gear (28), a gear shaft (29), a counterweight (30), a derrick (31), a derrick cable (32), and a counterweight cable (33). The output circulation forward and reverse rotation device (B) is fixed to the derrick (23) of the actuator (B) through a frame (11). The middle part of the crossbeam (26) is hinged to the top of the derrick (23) through the bearing assembly (24). The two ends of the crossbeam (26) are respectively connected to the donkey head (25). The shaft (23) is fixed, one of the shaft heads (25) is wound around a wellbore cable (32), the lower end of the wellbore cable (32) is connected to the wellbore (31); the other shaft head (25) is wound around a counterweight cable (33), the lower end of the counterweight cable (33) is connected to the counterweight (30); the lower ends of the two shaft heads (25) are respectively fixed to the two ends of an arc-shaped rack (27), the arc-shaped rack (27) is meshed with a gear (28), the gear (28) is sleeved on a gear shaft (29) and rotates with the gear shaft (29), the gear shaft (29) is hinged to a base connected to the derrick (23) through a bearing, and the gear shaft (29) is connected to an output shaft (16) of an output circulation forward and reverse rotation device (C).

2. A pumping unit using an output circulation forward and reverse rotation device according to claim 1, characterized in that: The output circulation forward and reverse rotation device (C) comprises a primary input shaft (1), a primary input shaft bearing (2), a primary input gear (3), a swing frame (4), a swing frame support bearing (5), a primary output gear (6), a primary output shaft (7), a secondary output gear (8), A columnar full-side rack (9), a sliding plate (10), a frame (11), an inner slider assembly (12), a sliding column (13), a spur rack (14), an output gear (15), an output shaft (16) and an output shaft bearing (17); a first-stage input gear (3) is sleeved on the first-stage input shaft (1); the first-stage input shaft (1) is arranged in a hole at the lower end of a swing frame (4) through a first-stage input shaft bearing (2); the lower end of the swing frame (4) is fixed to the frame (11) through a swing frame support bearing (5) and a bearing seat; a first-stage output gear (6) is meshed with the first-stage input gear (3); the first-stage output gear (6) is sleeved and fixed on the first-stage output shaft (7); both ends of the first-stage output shaft (7) are connected to the upper end of the swing frame (4) through a first-stage output shaft bearing (18); and a second-stage output gear (8) is sleeved on the inner end of the first-stage output shaft (7); A columnar full-side rack (9) is fixed to the side of a sliding plate (10); a secondary output gear (8) on a primary output shaft (7) meshes with the columnar full-side rack (9); an inner limit roller (201) and an outer limit roller (20) are provided at the end of the primary output shaft (7) inside the secondary output gear (8) through a bearing; an inner limit baffle (191) and an outer limit baffle (20) are provided on the sliding plate (10) where the columnar full-side rack (9) is located. The inner limit baffle (19) and the outer limit baffle (191) are formed on the columnar full-side rack (9), the inner limit roller (201) contacts the outer side of the inner limit baffle (191), and the outer limit roller (20) contacts the inner side of the outer limit baffle (19). The inner limit roller (201) and the outer limit roller (20) are limited so that the secondary output gear (8) is tightly meshed with the columnar full-side rack (9); A spur rack (14) is fixed to the other side of the sliding plate (10), and an inner slider assembly (12) is fixed to the four corners of the sliding plate (10). Two sliding columns (13) are fixed on the frame (11) at intervals in a vertical direction. A limiting slide groove (21) is provided in the middle of the sliding column (13). The inner slider assembly (12) on the same side of the sliding plate (10) is slidably arranged in the limiting slide groove (21). The limiting slide groove (21) can limit the sliding plate (10) from linearly moving up and down along the sliding column (13). The output gear (15) is meshed with the spur rack (14), the output gear (15) is sleeved and fixed on the output shaft (16), and the output shaft (16) at both ends of the output gear (15) is fixed on the frame (11) through output shaft bearings (17) and output shaft bearing seats (22).

3. A pumping unit using an output circulation forward and reverse rotation device according to claim 2, characterized in that: The inner slider assembly (12) comprises a limiting wheel assembly (121) and a fixing plate (122); the limiting wheel assembly (121) is hinged to the fixing plate (122); the limiting wheel assembly (121) comprises a front and rear limiting wheel assembly (1211) and a left and right limiting wheel assembly (1212).

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