Single arm rotary pumping assembly

Abstract

In order to solve the problem of low oil pumping efficiency in the existing oil pumping unit field, the present invention discloses a single-arm rotary oil pumping assembly, comprising: a frame; a traction motor, which is arranged on the frame; a swing arm, the middle part of which is arranged on the driving shaft of the traction motor and the swing arm rotates with the driving shaft; a steel wire rope and a balancing device, the upper end of the steel wire rope and the balancing device are respectively connected to the radial sides of the swing arm, the upper end of the steel wire rope is located at the axial front side of the swing arm, and the balancing device is located at the axial rear side of the swing arm; a limiting device, which is arranged on the frame and located below the swing arm, and is suitable for limiting the lifting and pulling of the steel wire rope. Through the axial misalignment of the steel wire rope, the balancing device and the swing arm on the swing arm, the swing arm can stably rotate continuously in one direction, thereby stably and efficiently circulating the pumped oil, and the oil pumping process eliminates the power loss of the traction motor during the reversing process and reduces the load of the components, and the components are not easily damaged.

Description

Technical Field

[0001] The invention relates to the field of raw material mining, in particular to a single-arm rotary oil pumping assembly. Background Art

[0002] The oil pump is a core component in an oil mining system. Its principle is to drive the wire rope through a traction machine so that the oil pump can move up and down and reciprocate in the oil well.

[0003] Common oil pumping units include a swing arm type oil pumping unit, which drives the horizontally arranged swing arm in normal state by a motor to swing in one direction at a certain angle to complete the upward pulling of the wire rope, and swings in the opposite direction at a certain angle to complete the downward pulling of the wire rope, thereby driving the sucker rod of the oil pump to lift and lower to pump oil. During this process, the motor often needs to switch between forward and reverse drive, and it must experience at least two rapid accelerations and decelerations in one cycle. The load on the motor drive shaft is large, and the oil pumping efficiency is not high. Summary of the invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a single-arm rotary oil pumping assembly, which significantly improves the oil pumping efficiency and reduces the component load.

[0005] According to an embodiment of the present invention, the single-arm rotary oil pumping assembly includes: a frame; a traction motor, which is arranged on the frame; a swing arm, the middle part of which is arranged on the driving shaft of the traction motor and the swing arm rotates with the driving shaft; a wire rope and a balancing device, the upper end of the wire rope and the balancing device are respectively connected to the radial sides of the swing arm, the upper end of the wire rope is located on the axial front side of the swing arm, and the balancing device is located on the axial rear side of the swing arm; a limiting device, which is arranged on the frame and located below the swing arm, and is suitable for limiting the lifting and traction of the wire rope.

[0006] The single-arm rotary oil pumping assembly according to the embodiment of the present invention has at least the following beneficial effects: through the axial staggered arrangement of the wire rope, the balancing device and the swing arm on the swing arm, the rotation paths of the wire rope, the balancing device and the swing arm do not overlap or interfere with each other during the rotation of the swing arm, and the swing arm can stably rotate continuously in one direction. Under the drive of the traction motor and the action of the limiting device, the balanced rotating swing arm can continuously and stably drive the wire rope to circulate and lift, thereby stably and efficiently circulating the oil. The oil pumping process eliminates the power loss of the traction motor during the commutation process and reduces the load on the components, and the components are not easily damaged.

[0007] According to some embodiments of the present invention, the single-arm rotary pumping assembly also includes a pumping rod, and the upper and lower ends of the wire rope are respectively provided with an upper rope head combination mechanism and a lower rope head combination mechanism, the upper rope head combination mechanism is suitable for connecting the rotating arm, and the lower rope head combination mechanism is suitable for connecting the pumping rod.

[0008] According to some embodiments of the present invention, the upper rope head assembly mechanism includes: an upper mounting frame, rotatably connected to the rotating arm; an upper cone sleeve, movably inserted on the upper mounting frame; an upper compression spring, two ends of which are respectively connected to one end of the upper cone sleeve inserted into the upper mounting frame and one end of the upper mounting frame receiving the upper cone sleeve, and the other end of the upper cone sleeve is connected to the upper end of the wire rope. The lower rope head assembly mechanism includes: a lower mounting frame, rotatably connected to the sucker rod; a lower cone sleeve, movably inserted on the lower mounting frame; a lower compression spring, two ends of which are respectively connected to one end of the lower cone sleeve inserted into the lower mounting frame and one end of the lower mounting frame receiving the lower cone sleeve, and the other end of the lower cone sleeve is connected to the lower end of the wire rope.

[0009] According to some embodiments of the present invention, the steel wire ropes include at least two, and the upper cone sleeve and the lower cone sleeve correspond to the number of the steel wire ropes one by one; the upper mounting frame is connected to the swing arm via a bearing, and the lower mounting frame is connected to the sucker rod via a bearing.

[0010] According to some embodiments of the present invention, the upper part of the frame includes a mounting platform, and the traction motor is mounted on the mounting platform; a frequency conversion control cabinet is arranged on the mounting platform, and the frequency conversion control cabinet signal is connected to the traction motor and is suitable for controlling the rotation speed of the traction motor.

[0011] According to some embodiments of the present invention, the rack includes a left side plate, a right side plate and an X-shaped connecting plate, and the left and right ends of the X-shaped connecting plate are respectively connected to the left side plate and the right side plate.

[0012] According to some embodiments of the present invention, a lifting ladder or a lifting elevator is provided on the right portion of the frame.

[0013] According to some embodiments of the present invention, the limiting device includes a first limiting wheel and a second limiting wheel respectively arranged on the left and the right, and the wire rope is suitable for passing between the first limiting wheel and the second limiting wheel from top to bottom.

[0014] According to some embodiments of the present invention, the single-arm rotary oil pumping assembly further includes: a weight compensation mechanism, which is disposed on the rotating arm and on the same side as the balancing device.

[0015] According to some embodiments of the present invention, the weight compensation mechanism includes: a screw seat, which is arranged on the rotating arm and extends between the rotation center of the rotating arm and the balancing device; a compensation motor, which is arranged at the end of the screw seat; a screw, which is transmission-connected to the compensation motor and rotatably connected to the screw seat; a slider, which is sleeved on the screw and cooperates with the screw thread and is movably connected to the screw seat; and a compensation balancing device, which is arranged on the slider.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a schematic diagram of the forward structure of an oil pumping assembly embodiment and an enlarged diagram of a part of the structure;

[0019] Figure 2 It is a lateral structural schematic diagram of an oil pumping assembly embodiment;

[0020] Figure 3 for Figure 2 Schematic diagram of the structure of the middle part;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the middle part;

[0022] Figure 5 It is a structural schematic diagram of an embodiment of a weight compensation mechanism;

[0023] Figure numbers: frame 100, installation platform 110, frequency conversion control cabinet 120, left side plate 130, right side plate 140, X-shaped connecting plate 150, lifting ladder 160, traction motor 200, rotating arm 300, wire rope 400, balancing device 500, limiting device 600, first limiting wheel 610, second limiting wheel 620, upper rope head assembly mechanism 700, upper mounting frame 710, upper cone sleeve 720, upper compression spring 730, lower rope head assembly mechanism 800, lower mounting frame 810, lower cone sleeve 820, lower compression spring 830, weight compensation mechanism 900, screw seat 910, compensation motor 920, screw 930, slider 940, compensation balancing device 950. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] An embodiment of the present invention provides a single-arm rotary oil pumping assembly, comprising: a frame; a traction motor, which is arranged on the frame; a swing arm, the middle part of which is arranged on the driving shaft of the traction motor and the swing arm rotates with the driving shaft; a wire rope and a balancing device, the upper end of the wire rope and the balancing device are respectively connected to the radial sides of the swing arm, the upper end of the wire rope is located on the axial front side of the swing arm, and the balancing device is located on the axial rear side of the swing arm; a limiting device, which is arranged on the frame and located below the swing arm, and is suitable for limiting the lifting and traction of the wire rope.

[0028] It should be understood that the middle part of the swing arm corresponds to a part of the middle of the swing arm, which may correspond to 1 / 4 to 3 / 4 of the swing arm along a length direction. The middle part of the swing arm is set on the drive shaft and may be any position of 1 / 4 to 3 / 4 of the swing arm on the drive shaft, preferably the center position of the swing arm.

[0029] Reference Figure 1 and Figure 4 The rotating arm 300 may include a long arm and a short arm that are perpendicular to each other. The long arm and the short arm intersect at the middle position. The ends of the long arm and the short arm are connected by connecting rods and / or ropes to form four sides. The four sides are configured in a rhombus. The short arm is thinner than the long arm. The long arm can be used to install other components, and the short arm and the connecting rod / rope are used to strengthen the strength of the rotating arm 300.

[0030] Reference Figure 1-Figure 3 , Figure 1 and Figure 2 The up and down directions in the figure correspond to the radial direction of the rotating arm 300 in the state of the figure. The upper end of the wire rope 400 is connected to one radial end of the rotating arm 300, and the balancing device 500 is connected to the other radial end of the rotating arm 300. Under this setting, the balancing device 500 and the wire rope 400 can balance the loads at both ends of the rotating arm 300 during the rotation process, and the load of the traction motor 200 is relatively reduced, which makes the rotating arm 300 rotate more smoothly and reduces the output power of the traction motor 200 required for the rotation of the rotating arm 300. Figure 2 and Figure 3The front-to-back direction corresponds to the axial direction of the swing arm 300 in the state of the figure, wherein the upper end of the wire rope 400 needs to be located at the axial front side of the swing arm 300, and the balancing device 500 needs to be located at the axial rear side of the swing arm 300. Under this setting, when the swing arm 300 rotates, the movement trajectories of the wire rope 400, the swing arm 300 and the balancing device 500 will not cross each other, and can move in three parallel planes, so that the swing arm 300 can drive the upper end of the wire rope 400 to cyclically rise and fall during the continuous rotation in the same direction, thereby driving the sucker rod of the oil pump at the lower end of the wire rope 400 to rise and fall to pump oil.

[0031] The function of the limit device is to limit the part below the upper end of the wire rope. Since the rotating arm drives the upper end of the wire rope to move along a circular trajectory, the wire rope needs to be limited by the limit device so that the lower part of the wire rope can move vertically up and down, thereby driving the sucker rod of the oil pump to lift and pump oil.

[0032] The balancing device can be hinged on the rotating arm, the balancing device can be a metal block, and can be a rectangular plate or a circular plate as a whole. The balancing device is preferably detachable, and the balancing device can also use other balancing weights commonly used in the field.

[0033] By axially staggering the wire rope, the balancing device and the swing arm on the swing arm, the rotation paths of the wire rope, the balancing device and the swing arm do not overlap or interfere with each other during the rotation of the swing arm, and the swing arm can stably rotate continuously in one direction. Under the drive of the traction motor and the action of the limit device, the balanced rotating swing arm can continuously and stably drive the wire rope to cyclically lift and lower movements, thereby stably and efficiently circulating the oil. The oil pumping process eliminates the power loss of the traction motor during the commutation process and reduces the load on components, and the components are not easily damaged.

[0034] In some embodiments of the present invention, the single-arm rotary oil pumping assembly may further include a sucker rod, and the upper and lower ends of the wire rope are respectively provided with an upper rope head combination mechanism and a lower rope head combination mechanism, the upper rope head combination mechanism is suitable for connecting the rotating arm, and the lower rope head combination mechanism is suitable for connecting the sucker rod.

[0035] It should be understood that the sucker rod is one of the components of the oil pump, which is a common mechanism in the current field. The process is to pump oil by the sucker rod moving up and down in the pump barrel. The upper rope head combination mechanism and the lower rope head combination mechanism are arranged to facilitate the installation and fixing of the wire rope.

[0036] In some embodiments of the present invention, referring to Figure 1The upper rope head assembly mechanism 700 may include: an upper mounting frame 710, rotatably connected to the rotating arm 300; an upper cone sleeve 720, movably inserted into the upper mounting frame 710; an upper compression spring 730, both ends of which are respectively connected to one end of the upper cone sleeve 720 inserted into the upper mounting frame 710 and one end of the upper mounting frame 710 for accommodating the upper cone sleeve 720 to be inserted therein, and the other end of the upper cone sleeve 720 is connected to the upper end of the wire rope 400.

[0037] It should be understood that the cone sleeve is a common component in the field for connecting the ends of wire ropes. The cone sleeve is cone-shaped as a whole. The cone sleeve can be sleeved on the wire rope and the end of the wire rope can be fixed by screw locking.

[0038] It should be understood that the function of the upper rope head assembly mechanism is mainly to provide elastic buffering and shock absorption. In addition to the upper compression spring, buffering and shock absorption can also be achieved in other ways, such as air shock absorption and hydraulic shock absorption. In addition, the setting of the upper rope head assembly mechanism can also facilitate the change of the relative position of the upper end of the wire rope during the rotation of the rotating arm, which is convenient for the removal of the wire rope.

[0039] Reference Figure 1 The lower rope head assembly mechanism 800 may include: a lower mounting frame 810, rotatably connected to the sucker rod; a lower cone sleeve 820, movably inserted into the lower mounting frame 810; a lower compression spring 830, both ends of which are respectively connected to one end of the lower cone sleeve 820 inserted into the lower mounting frame 810 and one end of the lower mounting frame 810 for accommodating the lower cone sleeve 820 to penetrate therein, and the other end of the lower cone sleeve 820 is connected to the lower end of the wire rope 400.

[0040] It should be understood that the cone sleeve is a common component in the field for connecting the ends of wire ropes. The cone sleeve is cone-shaped as a whole. The cone sleeve can be sleeved on the wire rope and the end of the wire rope can be fixed by screw locking.

[0041] It should be understood that the function of the lower rope head assembly mechanism is mainly to provide elastic buffering and shock absorption. In addition to the lower compression spring, other methods can also be used for buffering and shock absorption, such as air shock absorption and hydraulic shock absorption. In addition, the setting of the lower rope head assembly mechanism can also facilitate the relative position change between the wire rope and the sucker rod during the lifting process, and facilitate the removal of the wire rope.

[0042] In some embodiments of the present invention, the wire ropes may include at least two, and the upper cone sleeve and the lower cone sleeve correspond to the number of the wire ropes one by one. By using at least two steel wire ropes, the traction stability can be increased. Each steel wire rope has an upper cone sleeve and a lower cone sleeve corresponding to it, which can increase the connection stability of the steel wire ropes; the upper mounting frame can be connected to the swing arm via a bearing, and the lower mounting frame can be connected to the sucker rod via a bearing. The setting of the bearing can make the rotation more stable, the transmission efficiency higher, and the resistance smaller.

[0043] In some embodiments of the present invention, referring to Figure 1 The upper part of the frame 100 may include a mounting platform 110, and the traction motor 200 may be mounted on the mounting platform 110; a frequency conversion control cabinet 120 may be provided on the mounting platform 110, and the frequency conversion control cabinet 120 is connected to the traction motor 200 by signal and is suitable for controlling the speed of the traction motor 200. The upper part of the frame 100 may be understood as any position in the upper half of the frame 100, and the frequency conversion control cabinet 120 is a universal component for controlling the output speed of the motor, and the frequency conversion control cabinet 120 and the traction motor 200 may be connected by a cable or by an invalid data transmission method.

[0044] In some embodiments of the present invention, referring to Figure 1 The rack 100 may include a left side plate 130, a right side plate 140 and an X-shaped connecting plate 150, and the left and right ends of the X-shaped connecting plate 150 are respectively connected to the left side plate 130 and the right side plate 140. The arrangement of the X-shaped connecting plate 150 can enhance the structural strength of the rack 100.

[0045] The frame may further include a front side plate and a rear side plate, and the front side plate and the rear side plate may also be connected via an X-shaped connecting plate.

[0046] In some embodiments of the present invention, referring to Figure 1 , a lifting ladder 160 or a lifting elevator may be provided on the right side of the rack 100. The right side of the rack 100 may be understood as the right half of the rack 100, and a lifting ladder 160 or a lifting elevator may also be provided on the left half of the rack 100. The provision of a lowering ladder or a lifting elevator facilitates maintenance personnel to inspect, install, and replace parts.

[0047] Some embodiments of the present invention refer to Figure 1 The limiting device 600 may include a first limiting wheel 610 and a second limiting wheel 620 respectively arranged on the left and right sides, and the wire rope 400 is suitable for passing between the first limiting wheel 610 and the second limiting wheel 620 from top to bottom.

[0048] The first limiting wheel and the second limiting wheel can be symmetrically arranged, and the axes of the two are parallel. The first limiting wheel and the second limiting wheel clamp the two sides of the wire rope. When the wire rope is raised or lowered, the first limiting wheel and the second limiting wheel can press the wire rope on both sides to limit the vertical movement of the wire rope. The first limiting wheel and the second limiting wheel can reduce the friction resistance to the wire rope by self-rotation in the process of limiting the wire rope, so that the wire rope can move more smoothly.

[0049] It should be understood that the limiting device can also be a fixed vertical pipe, and the wire rope is raised and lowered in the vertical pipe to achieve vertical limiting.

[0050] In some embodiments of the present invention, the single-arm rotary oil pumping assembly further includes: a weight compensation mechanism, which is arranged on the swing arm and on the same side as the balancing device. The weight compensation mechanism is arranged on the same side as the balancing device, and its function is to compensate and adjust its own counterweight, and to adapt to the tension of the wire rope at the other end of the swing arm on the swing arm in combination with the balancing device. Specifically, when the tension of the wire rope on the swing arm changes, the counterweight of the balancing device can be kept unchanged, and the balance of the two ends of the swing arm can be maintained by adjusting the counterweight of the weight compensation mechanism. This counterweight can be understood as the torque of the heavy object suspended or towed on the swing arm relative to the rotation center of the swing arm.

[0051] In some embodiments of the present invention, referring to Figure 4 and Figure 5 The weight compensation mechanism 900 may include: a screw seat 910, which is arranged on the rotating arm 300 and extends between the rotation center of the rotating arm 300 and the balancing device 500; a compensation motor 920, which is arranged at the end of the screw seat 910; a screw 930, which is transmission-connected to the compensation motor 920 and rotatably connected to the screw seat 910; a slider 940, which is sleeved on the screw 930 and threadedly matched with the screw 930, and is movably connected to the screw seat 910; and a compensation balancing device 950, which is arranged on the slider 940.

[0052] The compensation motor drives the screw to rotate, so that the slider on the screw can move along the axial direction of the screw to adjust the position, thereby adjusting the torque of the compensation balance device relative to the rotation center of the swing arm, thereby adjusting the counterweight on one side of the swing arm to achieve the purpose of adapting to the change of the counterweight on the other side. Under this setting, the adjustment is very convenient and quick, and even a sensor can be combined to detect the real-time counterweight of the wire rope on the swing arm, and the sensor sends a signal to the compensation motor to adjust the position of the slider in real time, thereby adjusting the position of the compensation balance device in real time, and compensating the counterweight at both ends of the swing arm in real time to maintain the balance of both ends of the swing arm. Since the swing arm is usually connected to one end of the wire rope in a fixed position, a force sensor can be set at the position where the swing arm is connected to the wire rope, specifically between the upper mounting seat and the swing arm, so that the torque of the wire rope relative to the swing arm can be measured.

[0053] It should be understood that the method and understanding of the compensating balancing device can refer to the balancing device, which can be a metal block, can be a rectangular plate as a whole, or can be a circular plate. The compensating balancing device is preferably detachable, and the compensating balancing device can also use other balancing weights commonly used in the field.

[0054] It should be understood that the weight compensation mechanism can also be a direct-acting balancing device, that is, the balancing device can be moved radially close to or away from the rotation center of the rotating arm through a screw guide mechanism.

[0055] In the description of this specification, the description of reference terms such as "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. Single-arm rotary oil pumping assembly, characterized in that: include: Rack(100); A traction motor (200) is arranged on the frame (100); A rotating arm (300), the middle portion of which is arranged on the driving shaft of the traction motor (200) and the rotating arm (300) rotates along with the driving shaft; A steel wire rope (400) and a balancing device (500), wherein the upper end of the steel wire rope (400) and the balancing device (500) are respectively connected to two radial sides of the rotating arm (300), the upper end of the steel wire rope (400) is located at the axial front side of the rotating arm (300), and the balancing device (500) is located at the axial rear side of the rotating arm (300); A limiting device (600) is arranged on the frame (100) and is located below the rotating arm (300), and is suitable for limiting the lifting and pulling of the steel wire rope (400); It also includes a pumping rod, wherein the upper end and the lower end of the steel wire rope (400) are respectively provided with an upper rope head assembly mechanism (700) and a lower rope head assembly mechanism (800), wherein the upper rope head assembly mechanism (700) is suitable for connecting to the rotating arm (300), and the lower rope head assembly mechanism (800) is suitable for connecting to the pumping rod; The upper rope head assembly mechanism (700) comprises: An upper mounting frame (710) rotatably connected to the rotating arm (300); An upper cone sleeve (720) is movably mounted on the upper mounting frame (710); An upper compression spring (730), two ends of which are respectively connected to one end of the upper cone sleeve (720) passing through the upper mounting frame (710) and one end of the upper mounting frame (710) receiving the upper cone sleeve (720) passing through, and the other end of the upper cone sleeve (720) is connected to the upper end of the steel wire rope (400); The lower rope head assembly mechanism (800) comprises: A lower mounting frame (810) rotatably connected to the pumping rod; A lower cone sleeve (820) is movably mounted on the lower mounting frame (810); A lower compression spring (830), two ends of which are respectively connected to one end of the lower cone sleeve (820) passing through the lower mounting frame (810) and one end of the lower mounting frame (810) receiving the lower cone sleeve (820) passing through, and the other end of the lower cone sleeve (820) is connected to the lower end of the steel wire rope (400); The limiting device (600) comprises a first limiting wheel (610) and a second limiting wheel (620) which are arranged on the left and right sides respectively, and the steel wire rope (400) is suitable for passing between the first limiting wheel (610) and the second limiting wheel (620) from top to bottom.

2. The single-arm rotary oil pumping assembly according to claim 1, characterized in that: The steel wire rope (400) includes at least two, and the upper cone sleeve (720) and the lower cone sleeve (820) correspond to the number of the steel wire ropes (400) one by one; the upper mounting frame (710) is connected to the swing arm (300) via a bearing, and the lower mounting frame (810) is connected to the sucker rod via a bearing.

3. The single-arm rotary oil pumping assembly according to claim 1, characterized in that: The upper part of the frame (100) comprises a mounting platform (110), and the traction motor (200) is mounted on the mounting platform (110); a frequency conversion control cabinet (120) is arranged on the mounting platform (110), and the frequency conversion control cabinet (120) is signal-connected to the traction motor (200) and is suitable for controlling the rotation speed of the traction motor (200).

4. The single-arm rotary oil pumping assembly according to claim 1, characterized in that: The frame (100) comprises a left side plate (130), a right side plate (140) and an X-shaped connecting plate (150), wherein the left and right ends of the X-shaped connecting plate (150) are respectively connected to the left side plate (130) and the right side plate (140).

5. The single-arm rotary oil pumping assembly according to claim 1, characterized in that: A lifting ladder (160) or a lifting elevator is arranged on the right side of the frame (100).

6. The single-arm rotary oil pumping assembly according to any one of claims 1 to 5, characterized in that: Also includes: A weight compensation mechanism (900) is arranged on the rotating arm (300) and on the same side as the balancing device (500).

7. The single-arm rotary oil pumping assembly according to claim 6, characterized in that: The weight compensation mechanism (900) comprises: A screw rod (930) seat (910) is disposed on the rotating arm (300) and extends between the rotation center of the rotating arm (300) and the balancing device (500); A compensating motor (920) is arranged at the end of the screw rod (930) seat (910); A screw rod (930) is transmission-connected to the compensation motor (920) and rotatably connected to the screw rod (930) seat (910); A slider (940) is sleeved on the screw rod (930) and is threadably matched with the screw rod (930) and is movably connected to the screw rod (930) seat (910); A compensating balancing device (950) is arranged on the sliding block (940).

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