Rail wheel mechanism for pumping unit
By using the guide wheel assembly and shock absorption assembly in the guide wheel mechanism, the instability of the oil pumping unit caused by the vibration of the counterweight is solved, thereby improving the oil pumping efficiency and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG RONGJIAN NEW ENERGY TECHNOLOGY DEVELOPMENT CO LTD
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-24
AI Technical Summary
In existing hydraulic pumping units, the counterweight is prone to vibration or swaying during its up-and-down movement, which causes the hydraulic cylinder and sucker rod to move asynchronously, affecting pumping efficiency and equipment stability.
The guide wheel mechanism includes a guide wheel assembly, a hinge assembly, a hinge limiting assembly, and a shock absorption assembly. The guide wheel constrains the movement trajectory of the counterweight, the hinge assembly allows for flexible movement, and the shock absorption assembly absorbs vibrations, thereby improving stability and smoothness.
It significantly reduces the vibration and sway of the counterweight, optimizes the operating performance of the pumping unit, reduces the pressure and power consumption of the hydraulic system, and improves pumping efficiency and equipment stability.
Smart Images
Figure CN224550085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic pumping unit technology, and in particular to a guide wheel mechanism for a pumping unit. Background Technology
[0002] A hydraulic pumping unit is a mechanical oil extraction device that uses a hydraulic system to drive the reciprocating motion of a sucker rod. It is an upgraded form of rodless oil extraction technology. It replaces the traditional mechanical transmission structure with the extension and retraction of a hydraulic cylinder to achieve efficient lifting of crude oil from the bottom of the well to the surface.
[0003] Hydraulic pumping units are equipped with counterweight components. When the sucker rod moves upward, it must overcome resistance from its own weight and the viscosity of the crude oil. Conversely, when it moves downward, these factors accelerate its descent. The mass of the counterweight balances part of the load on the sucker rod during its upward and downward strokes. This allows the hydraulic cylinder to only overcome the weight difference between the sucker rod and the counterweight, thus reducing the working pressure and power consumption of the hydraulic system. The pressure generated is only the difference between the suspension point load and the counterweight weight, effectively reducing the pressure on the hydraulic cylinder and decreasing the energy consumption of the pumping unit. Simultaneously, during hydraulic cylinder reversal, the inertia of the counterweight mitigates the drastic load fluctuations, reducing system impact and vibration, and counteracting the unbalanced torque generated by the sucker rod at the moment of reversal, making the pumping unit's operation more stable. Currently, the counterweight is mainly connected to the sucker rod via steel cables. The up-and-down movement of the sucker rod causes the counterweight to vibrate or sway, easily leading to asynchronous movements of the hydraulic cylinder and sucker rod, resulting in phase misalignment. This can impact components such as the reversing valve, reducing pumping efficiency.
[0004] Therefore, those skilled in the art are dedicated to developing a guide wheel mechanism for oil pumping units to reduce vibration or swaying during the up-and-down movement of the counterweight and improve oil pumping efficiency. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a guide wheel mechanism for an oil pumping unit, which reduces the vibration or shaking generated during the up-and-down movement of the counterweight and improves the oil pumping efficiency. The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A guide wheel mechanism for an oil pumping unit, comprising: Counterweight; The guide wheel assembly is mounted on a mounting plate and abuts against the guide base. A hinge assembly is provided, wherein the lower end of the mounting plate is connected to the side wall of the counterweight block via the hinge assembly; A hinged limiting assembly is provided, wherein the upper end of the mounting plate is connected to the side wall of the counterweight block via the hinged limiting assembly; A shock-absorbing component is installed on the side wall of the mounting plate, and both ends of the shock-absorbing component abut against the mounting plate and the counterweight, respectively.
[0006] The beneficial effects of adopting the above scheme are as follows: through the synergistic effect of the counterweight, guide wheel assembly, hinge assembly, hinge limit assembly and shock absorption assembly, the operating performance of the pumping unit can be significantly optimized. The counterweight balances the sucker rod load, reduces the pressure and power consumption of the hydraulic system, the guide wheel assembly constrains the movement trajectory of the counterweight, reduces swaying and improves stability, the hinge assembly and hinge limit assembly allow the counterweight to move flexibly and avoid impact, and the shock absorption assembly absorbs vibration and improves smoothness.
[0007] Based on the above technical solution, the present invention can be further improved as follows.
[0008] Furthermore, the guide wheel assembly includes a guide wheel, the outer edge of which abuts against the guide base, and both ends of the guide wheel are mounted on the mounting plate via a first mounting bracket and a second mounting bracket, respectively.
[0009] The beneficial effects of adopting the above-mentioned further solution are: the guide wheel abuts against the guide base, constraining the horizontal movement of the counterweight, reducing vibration and swaying; the mounting bracket fixes the guide wheel, ensuring alignment accuracy and improving movement stability.
[0010] Furthermore, the hinge assembly includes a rotating column mounted on the end of the mounting plate, with rotating sleeves fitted at both ends of the rotating column, and the rotating sleeves being connected to the counterweight.
[0011] The beneficial effect of adopting the above-mentioned further solution is that the hinge between the rotating column and the rotating sleeve allows the mounting plate to rotate around the rotating sleeve, so that its guide wheel and the guide base are always in close contact.
[0012] Furthermore, the hinged limiting assembly includes a limiting stud, and the mounting plate is provided with a through hole for the limiting stud to pass through. A first limiting bolt and a second limiting bolt are provided outside the limiting stud, and the first limiting bolt and the second limiting bolt are respectively located on both sides of the mounting plate. The end of the limiting stud is connected to the counterweight block via a hinged seat.
[0013] The beneficial effect of adopting the above-mentioned further solution is that the limiting stud and the limiting bolt cooperate to limit the range of motion of the mounting plate and prevent excessive displacement.
[0014] Furthermore, the hinge seat includes a first hinge member and a second hinge member, the end of the limiting stud is located between the first hinge member and the second hinge member, and the hinge pin passes through the first hinge member, the limiting stud and the second hinge member in sequence.
[0015] The beneficial effect of adopting the above-mentioned further solution is that the hinge pin passes through the first hinge member, the limiting stud and the second hinge member in sequence, so that the limiting stud can rotate around the hinge pin, so that the mounting plate has clearance space when it rotates hinged.
[0016] Furthermore, the shock absorption assembly includes a shock absorption spring and a limiting post. The limiting post is mounted on the mounting plate, and the shock absorption spring is sleeved outside the limiting post. Both ends of the shock absorption spring abut against the mounting plate and the counterweight, respectively.
[0017] The beneficial effects of adopting the above-mentioned further solution are: the shock-absorbing spring and the limiting column cooperate to make the guide wheel abut against the guide base and absorb the vibration and impact generated when the guide wheel or counterweight moves, thereby improving the stability of the device operation.
[0018] Furthermore, the guide base includes a fixed base, on which symmetrical first guide posts and second guide posts are mounted, and the outer edge of the guide wheel abuts against the side of the first guide post or the second guide post.
[0019] The beneficial effect of adopting the above-mentioned further scheme is that the symmetrical arrangement of the first guide post and the second post enables the counterweight block located between them to be used for joint restraint, thereby reducing the lateral vibration of the counterweight block.
[0020] Furthermore, the first guide post and the second guide post are also equipped with limiting baffles for limiting the guide wheel.
[0021] The beneficial effect of adopting the above-mentioned further solution is that the limiting baffle is used to limit the longitudinal vibration of the guide wheel, thereby limiting the longitudinal vibration of the counterweight. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the guide wheel mechanism for an oil pumping unit according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the guide wheel assembly, hinge assembly, hinge limiting assembly, and shock absorption assembly in a specific embodiment of the present utility model; Figure 3 This is a schematic diagram of the guide base structure in a specific embodiment of the present invention.
[0023] The attached diagram lists the components represented by each number as follows: 1. Counterweight; 2. Guide wheel assembly; 3. Mounting plate; 4. Guide base; 5. Hinge assembly; 6. Hinge limiting assembly; 7. Shock absorption assembly; 8. Guide wheel; 9. First mounting bracket; 10. Second mounting bracket; 11. Rotating column; 12. Rotating sleeve; 13. Limiting stud; 14. First limiting bolt; 15. Second limiting bolt; 16. First hinge; 17. Second hinge; 18. Hinge pin; 19. Shock absorption spring; 20. Limiting column; 21. Fixed base; 22. First guide column; 23. Second guide column; 24. Limiting baffle. Detailed Implementation
[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0025] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0026] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a guide wheel mechanism for an oil pumping unit includes... Counterweight 1, the upper end of counterweight 1 is connected to the oil pumping unit rod by a cable; Guide wheel assembly 2 is mounted on mounting plate 3 and abuts against guide base 4. The lower end of the mounting plate 3 is connected to the side wall of the counterweight 1 via the hinge assembly 5. The hinged limiting component 6 connects the upper end of the mounting plate 3 to the side wall of the counterweight block 1. The shock absorber 7 is installed on the side wall of the mounting plate 3, and both ends of the shock absorber 7 abut against the mounting plate 3 and the counterweight block 1, respectively.
[0029] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the guide wheel assembly 2 includes a guide wheel 8, which can be a rubber wheel or a metal wheel. The outer edge of the guide wheel 8 abuts against the guide base 4. The two ends of the guide wheel 8 are respectively mounted on the mounting plate 3 through the first mounting bracket 9 and the second mounting bracket 10. When the counterweight 1 moves up and down, the guide wheel 8 rolls along the guide base 4 and uses the rolling friction pair to convert the lateral displacement tendency generated by the counterweight 1 into the pure rolling of the guide wheel 8, thereby constraining the counterweight 1 to move only in the vertical direction.
[0030] like Figure 2 As shown, in another embodiment, the hinge assembly 5 includes a rotating column 11 installed at the end of the mounting plate 3. The rotating column 11 is fitted with rotating sleeves 12 at both ends. The rotating sleeves 12 are connected to the counterweight 1. When the guide wheel 8 has uneven contact pressure distribution with the guide column due to manufacturing errors, wear, or vibration, the mounting plate 3 adaptively generates a small swing with the rotating column 11 as the axis of rotation, so that the guide wheel 8 always maintains line contact with the guide base 4, avoiding local stress concentration.
[0031] In this embodiment, the hinged limiting assembly 6 includes a limiting stud 13. A through hole for the limiting stud 13 to pass through is provided on the mounting plate 3. The diameter of the through hole is larger than the diameter of the limiting stud 13, allowing for clearance when the limiting stud 13 rotates. A first limiting bolt 14 and a second limiting bolt 15 are provided outside the limiting stud 13. The diameter of the through hole is smaller than the diameters of the first limiting bolt 14 and the second limiting bolt 15. The first limiting bolt 14 and the second limiting bolt 15 are located on opposite sides of the mounting plate 3. The end of the limiting stud 13 is connected to the counterweight 1 via a hinge seat. The first limiting bolt 14 and the second limiting bolt 15 form adjustable dead points on both sides of the mounting plate 3, preventing excessive swaying of the mounting plate 3 due to external impacts.
[0032] In this embodiment, the hinge seat includes a first hinge member 16 and a second hinge member 17. The end of the limiting stud 13 is located between the first hinge member 16 and the second hinge member 17. The hinge pin 18 passes through the first hinge member 16, the limiting stud 13, and the second hinge member 17 in sequence, so that the end of the limiting stud 13 can rotate around the hinge pin 18. When the end of the mounting plate 3 rotates around the rotating sleeve 12, the limiting stud 13 rotates synchronously.
[0033] like Figure 1 , Figure 2 As shown, in some embodiments, the damping assembly 7 includes a damping spring 19 and a limiting post 20. The limiting post 20 is mounted on the mounting plate 3 and is short in length, used only to fix and limit the end of the damping spring 19. The damping spring 19 is sleeved on the limiting post 20, and both ends of the damping spring 19 abut against the mounting plate 3 and the counterweight 1, respectively. The damping spring 19 forms a pre-compressed elastic support between the mounting plate 3 and the counterweight 1. The amount of pre-compression is set by the length of the limiting post 20. When the counterweight 1 generates an inertial impact at the moment of the sucker rod reversal, the damping spring 19 absorbs the impact energy and prolongs the impact time through the compression and rebound process, thereby reducing the vibration amplitude. The limiting post 20 provides radial support when the spring is compressed to prevent the spring from becoming unstable.
[0034] In other embodiments, the shock-absorbing component 7 may also be a buffer airbag, with the two sides of the buffer airbag abutting against the mounting plate 3 and the counterweight 1 respectively, which can also achieve the shock-absorbing effect.
[0035] like Figure 1 , Figure 3 As shown, in this embodiment, the guide base 4 includes a fixed base 21, which provides stable support. Symmetrical first guide posts 22 and second guide posts 23 are mounted on the fixed base 21. The outer edge of the guide wheel 8 abuts against the side of the first guide post 22 or the second guide post 23. The guide wheel mechanism and the counterweight 1 are located between the first guide post 22 and the second guide post 23. The first guide post 22 and the second guide post 23 provide stable support and limit the guide wheel mechanism. To further reduce the longitudinal sway of the counterweight 1, limiting baffles 24 for limiting the guide wheel 8 are also installed on the sides of the first guide post 22 and the second guide post 23. When the pumping unit encounters extreme operating conditions causing the guide wheel 8 to jump longitudinally, the bottom surface of the limiting baffle 24 contacts the end face of the guide wheel 8 and generates sliding friction. The friction force rapidly attenuates the jumping energy, allowing the guide wheel 8 to return to its normal working position.
[0036] In other embodiments, when the guide wheel 8 is a metal wheel, nozzles are also installed on the first guide post 22 and the second guide post 23 to periodically spray grease onto the surface in contact with the guide wheel 8, thereby reducing the rolling friction of the guide wheel 8 and reducing the wear rate of the guide wheel 8.
[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A guide wheel mechanism for an oil pumping unit, characterized in that: include Counterweight (1); Guide wheel assembly (2), which is mounted on mounting plate (3) and abuts against guide base (4). The lower end of the mounting plate (3) is connected to the side wall of the counterweight (1) via the hinge assembly (5); The upper end of the mounting plate (3) is connected to the side wall of the counterweight (1) through the hinged limiting assembly (6); The shock-absorbing component (7) is installed on the side wall of the mounting plate (3), and both ends of the shock-absorbing component (7) abut against the mounting plate (3) and the counterweight (1) respectively.
2. The guide wheel mechanism for an oil pumping unit according to claim 1, characterized in that: The guide wheel assembly (2) includes a guide wheel (8), the outer edge of which abuts against the guide base (4), and the two ends of the guide wheel (8) are respectively mounted on the mounting plate (3) through a first mounting bracket (9) and a second mounting bracket (10).
3. The guide wheel mechanism for an oil pumping unit according to claim 1, characterized in that: The hinge assembly (5) includes a rotating column (11) installed at the end of the mounting plate (3), with rotating sleeves (12) sleeved at both ends of the rotating column (11), and the rotating sleeves (12) being connected to the counterweight (1).
4. The guide wheel mechanism for an oil pumping unit according to claim 1, characterized in that: The hinged limiting assembly (6) includes a limiting stud (13). The mounting plate (3) is provided with a through hole for the limiting stud (13) to pass through. A first limiting bolt (14) and a second limiting bolt (15) are provided outside the limiting stud (13). The first limiting bolt (14) and the second limiting bolt (15) are located on both sides of the mounting plate (3). The end of the limiting stud (13) is connected to the counterweight (1) via a hinge seat.
5. The guide wheel mechanism for an oil pumping unit according to claim 4, characterized in that: The hinge base includes a first hinge member (16) and a second hinge member (17). The end of the limiting stud (13) is located between the first hinge member (16) and the second hinge member (17). The hinge pin (18) passes through the first hinge member (16), the limiting stud (13) and the second hinge member (17) in sequence.
6. The guide wheel mechanism for an oil pumping unit according to claim 1, characterized in that: The shock absorption assembly (7) includes a shock absorption spring (19) and a limiting post (20). The limiting post (20) is installed on the mounting plate (3). The shock absorption spring (19) is sleeved on the limiting post (20), and the two ends of the shock absorption spring (19) abut against the mounting plate (3) and the counterweight (1) respectively.
7. The guide wheel mechanism for an oil pumping unit according to claim 2, characterized in that: The guide base (4) includes a fixed base (21), on which a first guide post (22) and a second guide post (23) are mounted symmetrically. The outer edge of the guide wheel (8) abuts against the side of the first guide post (22) or the second guide post (23).
8. The guide wheel mechanism for an oil pumping unit according to claim 7, characterized in that: The first guide post (22) and the second guide post (23) are also equipped with limiting baffles (24) for limiting the guide wheel (8).