A reducer for a straight-line single-output-shaft pumping unit

Abstract

The utility model discloses a kind of reduction gear for in-line single-output shaft oil pumping unit, it is related to oil production technical field, including reduction gear body, the top of reduction gear body is provided with oiling mechanism for realizing automatic filling lubricating oil to reduction gear body internal gear, including in oiling mechanism, the oiling mechanism includes: injection unit, through the linkage design of ball valve and porous injection box in injection unit, in combination with the accurate control of driving unit, the timing, quantitative automatic filling of lubricating oil is realized.Oil lubricant is evenly sprayed to gear surface through the multiple injection holes distributed in the bottom of injection box, forms complete oil film, significantly solve the delay, omission and oil quantity uneven problem of manual oiling.This design effectively avoids the risk of pitting, cementing and broken tooth caused by instantaneous oil shortage or oil film rupture of gear, greatly improves the operation reliability and service life of reduction gear under continuous high load condition.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology, specifically a reducer for an inline single-output shaft oil pumping unit. Background Technology

[0002] In the oil extraction field, pumping oil from deep underground into pipelines and then to transfer stations requires the use of pumping units. The most widely used pumping units in China are the walking beam type, which converts the circular motion of the electric motor into the up-and-down linear motion of the sucker rod.

[0003] According to the patent titled "A Swing-Type Dual-Well Pumping Unit" (Patent Publication No.: CN201874536U, Patent Publication Date: 2011-06-22), a crank wheel is used as the core transmission component. A crank arm is fixedly mounted on the crank wheel, with a portion of the crank arm extending beyond the circumference of the crank wheel. A permanent magnet synchronous motor is typically chosen as the power source, with the crank wheel coaxial with the main shaft of the permanent magnet synchronous motor; alternatively, an asynchronous motor can be chosen as the power source, with the crank wheel coaxial with the power output shaft of the reducer driven by the asynchronous motor. A crank connecting rod is also included, with one end connected to the crank arm via a (crank arm) pin, and the other end connected to the lower part of the rocker arm via a rocker arm pin. This design allows the permanent magnet synchronous motor to directly drive dual-well pumping, eliminating the need for frequent forward and reverse rotation. The motor operates at a constant speed, resulting in high reliability, simple control, and low maintenance costs. Based on the aforementioned existing technology, current gearboxes for inline single-output shaft oil pumping units still have the following problems: Lubrication is typically done manually, which relies on the operator's experience and sense of responsibility, making it prone to forgetting, delays, or insufficient lubrication. Under high-load, continuous operation of the oil pumping unit, momentary oil shortages or oil film rupture can accelerate wear, leading to pitting, galling, or even tooth breakage. Therefore, this invention provides a gearbox for inline single-output shaft oil pumping units. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a reducer for an inline single-output shaft oil pumping unit. It solves the following problems associated with existing reducers for inline single-output shaft oil pumping units: Lubrication in existing reducers is typically done manually. Manual lubrication relies on the operator's experience and responsibility, and is prone to forgetting, delays, or insufficient lubrication. Under high-load, continuous operation of the oil pumping unit, momentary oil shortages or oil film rupture can accelerate wear, leading to pitting, galling, and even tooth breakage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reducer for a straight-line single-output shaft oil pump, comprising a base, a motor fixedly mounted on the top of the base, a brake disc and brake mechanism, and a drum coupling fixedly mounted on the output end of the motor, a reducer body fixedly mounted on the output end of the drum coupling, and a drive sprocket fixedly mounted on the output end of the reducer body. The shafts of the motor, drum coupling, reducer body, and drive sprocket are parallel and coaxial. The reducer body includes a housing fixedly mounted on the top of the base. The reducer body has an internally rotating high-speed shaft, and a bearing bracket is fixedly installed inside the housing. A low-speed shaft is rotatably installed inside the bearing bracket. A set of gear rings is rotatably installed on the surface, and a planetary gear carrier is rotatably installed at one end of the bearing bracket. Three sets of planetary gears are rotatably installed in a circumferential array on the inner side of the planetary gear carrier. The planetary gears and gear rings mesh with the high-speed shaft. The low-speed shaft and the high-speed shaft are parallel and coaxial. A lubrication mechanism is provided on the top of the reducer body for automatically adding lubricating oil to the gears inside the reducer body. The lubrication mechanism includes:

[0006] The oil filling unit is located inside the oil storage unit and includes an oil pipe. A ball valve is rotatably installed inside the oil pipe. By rotating the ball valve, the lubricating oil stored in the oil storage unit enters the interior of the reducer body, thereby realizing automatic lubrication.

[0007] Preferably, the refueling mechanism further includes: an oil storage unit, located on the top of the reducer body, for storing lubricating oil; and a drive unit, located on the right side of the oil storage unit, for driving the rotation of the ball valve to open and close the oil pipe.

[0008] Preferably, the oil storage unit includes a base plate fixedly installed above the reducer body by bolts, and an oil storage tank is fixedly installed on the top of the base plate to store lubricating oil. An oil pipe is fixedly installed through the base plate and the arc-shaped connecting pad to the inside of the oil storage tank.

[0009] Preferably, the oil reservoir has an observation window on its front side to observe the level of lubricating oil inside. A top cover and control module are fixedly installed on the top of the oil reservoir, and a side cover is fixedly installed on the right side of the oil reservoir. Preferably, the drive unit includes a fixed base fixedly installed on the top of the oil reservoir. A rotating shaft is rotatably installed inside the fixed base. A first synchronous pulley is fixedly installed at the right end of the rotating shaft. A rotating column is fixedly installed on the right side of the ball valve, and the right end of the rotating column passes through the ball valve and the oil reservoir and is fixedly installed with a second synchronous pulley. A synchronous belt is installed between the second and first synchronous pulleys. A small electric motor is fixedly installed on the top of the reducer body, and a worm gear is fixedly installed at the output end of the small electric motor. A worm wheel is fixedly installed on the surface of the rotating shaft, and the worm wheel meshes with the worm. A bearing seat is fixedly installed on the front side of the fixed base, and the front end of the worm rotates inside the bearing seat.

[0010] Preferably, a limiting rod is fixedly installed inside the fixed base, and an arc groove is opened inside the worm gear, with the limiting rod sliding inside the arc groove to limit the rotation angle of the worm gear.

[0011] This utility model provides a speed reducer for an inline single-output shaft oil pumping unit, which has the following advantages compared with the prior art: 1. This inline single-output shaft oil pump reducer achieves automatic, timed, and metered lubricant filling through a linkage design between the ball valve and the multi-hole oil filling box in the oil filling unit, combined with precise control of the drive unit. Lubricant is evenly sprayed onto the gear surface through multiple oil filling holes distributed at the bottom of the oil filling box, forming a complete oil film. This significantly solves the problems of delay, leakage, and uneven oil volume associated with manual oiling. This design effectively avoids the risks of pitting, galling, and tooth breakage caused by momentary oil shortage or oil film rupture, greatly improving the reducer's operational reliability and service life under continuous high-load conditions. 2. The reducer and drive unit of this inline single-output shaft oil pump utilize the self-locking characteristics of a worm gear and a mechanical limit structure to achieve precise control of the ball valve's opening and closing angle, ensuring the reliability and repeatability of the oil injection operation. Combined with timing commands from the control module, the system can automatically execute a cycle of valve opening for oil injection – timed hold – valve closing for stop, completely eliminating reliance on manual operation. This reduces maintenance frequency and the risk of operational errors, and also lowers long-term maintenance costs. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the reducer body of this utility model; Figure 3 This is a partial cross-sectional perspective view of the reducer body of this utility model; Figure 4 This is a three-dimensional structural diagram of the refueling mechanism of this utility model; Figure 5 This is a front sectional perspective view of the refueling mechanism of this utility model; Figure 6 This is a partial three-dimensional structural view of the refueling mechanism of this utility model from a front sectional view. Figure 7 This is a partial three-dimensional structural view of the refueling mechanism of this utility model from the left front section. Figure 8 This is a perspective view of a coaxial line connection embodiment of the reducer for an inline single-output shaft oil pumping unit according to this utility model. Figure 9 This is a perspective view of a non-coaxial connection embodiment of the reducer for an inline single-output shaft oil pumping unit according to this utility model. In the diagram: 1-Gearbox body, 11-Housing, 12-High-speed shaft, 13-Bearing bracket, 14-Low-speed shaft, 15-Gear ring, 16-Planetary gear carrier, 17-Planetary gear, 2-Oil filling mechanism, 20-Arc-shaped connecting pad, 21-Oil storage unit, 211-Base plate, 212-Oil tank, 213-Observation window, 214-Top cover, 215-Side cover, 216-Control module, 22-Oil filling unit, 221-Oil pipe, 222- 23-Ball valve, 23-Drive unit, 231-Fixed seat, 232-Rotating shaft, 233-First synchronous pulley, 234-Worm gear, 235-Small electric motor, 236-Worm, 237-Bearing seat, 238-Arc groove, 239-Limit rod, 2310-Rotating column, 2311-Second synchronous pulley, 2312-Synchronous belt, 3-Motor, 4-Drum coupling, 40-Brake disc, 41-Brake mechanism, 5-Base, 6-Drive sprocket. Detailed Implementation

[0013] The technical solutions of this utility model will be clearly and completely described below with reference to two embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model, for example... Figure 8 This invention provides a different type of speed reducer in this solution. The present invention also provides a technical solution, such as... Figure 9 As shown, the principles of these two embodiments are the same as those of the embodiments described above, and the motor 3, coupling 4, reducer 1, and drive sprocket 6 are connected in a straight line, with the drive sprocket 6 being a single-shaft, single-wheel output power. Detailed descriptions are omitted.

[0014] Please see Figures 1-7A reducer for an inline single-output shaft oil pump includes a base 5. A motor 3 is fixedly mounted on the top of the base 5. A drum coupling 4 is fixedly mounted on the output end of the motor 3. A reducer body 1 is fixedly mounted on the output end of the drum coupling 4. A drive sprocket 6 is fixedly mounted on the output end of the reducer body 1. The shafts of the motor 3, drum coupling 4, reducer body 1, and drive sprocket 6 are parallel or coaxial. The reducer body 1 includes a housing 11 fixedly mounted on the top of the base 5. A high-speed shaft 12 is rotatably connected inside the housing 11. A bearing housing 13 is fixedly mounted, and a low-speed shaft 14 is rotatably mounted inside the bearing housing 13. A set of gear rings 15 is rotatably mounted on the surface of the bearing housing 13, and a planetary gear carrier 16 is rotatably mounted at one end of the bearing housing 13. Three sets of planetary gears 17 are rotatably mounted in a circumferential array on the inner side of the planetary gear carrier 16. The planetary gears 17 and the gear rings 15 are meshed with the high-speed shaft 12, and the axes of the low-speed shaft 14 and the high-speed shaft 12 are parallel. A lubrication mechanism 2 is provided on the top of the reducer body 1 to automatically add lubricating oil to the gears inside the reducer body 1. The lubrication mechanism 2 includes:

[0015] The oil injection unit 22 is located inside the oil storage unit 21 and includes an oil pipe 221. A ball valve 222 is rotatably installed inside the oil pipe 221. By rotating the ball valve 222, the lubricating oil stored in the oil storage unit 21 enters the interior of the reducer body 1, thereby realizing automatic lubrication.

[0016] In this embodiment, the refueling mechanism 2 also includes: Oil storage unit 21 is located on the top of the reducer body 1 and is used to store lubricating oil; The drive unit 23 is located on the right side of the oil storage unit 21 and is used to rotate the ball valve 222 to open and close the oil pipe 221.

[0017] In this embodiment, the oil storage unit 21 includes a base plate 211 that is fixedly installed on the top of the reducer body 1 by bolts, and an oil storage tank 212 is fixedly installed on the top of the base plate 211. The oil storage tank 212 is used to store lubricating oil, and an oil pipe 221 is fixedly installed through the base plate 211 and the arc-shaped connecting pad 20 to the inside of the oil storage tank 212.

[0018] The base plate 211 is fixed to the top of the reducer by bolts, and the oil reservoir 212 and oil passage are integrated. In this embodiment, an observation window 213 is provided on the front side of the oil tank 212 to observe the level of lubricating oil inside the oil tank 212. A top cover 214 and a control module 216 are fixedly installed on the top of the oil tank 212, and a side cover 215 is fixedly installed on the right side of the oil tank 212.

[0019] The observation window 213 is used to monitor the oil level. The top cover 214 and the side cover 215 protect the drive unit 23. The control module 216 is model S7-200CN. The control module 216 automatically manages the lubrication cycle and controls the oil injection interval and oil injection duration. In this embodiment, the drive unit 23 includes a fixed base 231 fixedly installed on the top of the oil reservoir 212. A rotating shaft 232 is rotatably installed inside the fixed base 231. A first synchronous pulley 233 is fixedly installed on the right end of the rotating shaft 232. A rotating column 2310 is fixedly installed on the right side of the ball valve 222. The right end of the rotating column 2310 passes through the ball valve 222 and the oil reservoir 212 and is fixedly installed with a second synchronous pulley 2311. A synchronous belt 2312 is installed between the second synchronous pulley 2311 and the first synchronous pulley 233. A small electric motor 235 is fixedly installed on the top of the reducer body 1. A worm gear 236 is fixedly installed at the output end of the small electric motor 235. A worm wheel 234 is fixedly installed on the surface of the rotating shaft 232. The worm wheel 234 and the worm gear 236 are meshed together. A bearing seat 237 is fixedly installed on the front side of the fixed base 231. The front end of the worm gear 236 rotates inside the bearing seat 237.

[0020] The small electric motor 235, model OMV800, is connected to an external power supply and is operated via a human-controlled control panel. When the small electric motor 235 receives a timed start signal, it runs, driving the worm gear 236 to rotate. The worm gear 236 drives the worm wheel 234 to rotate. The worm wheel 234 drives the first synchronous pulley 233 to rotate via the rotating shaft 232. The first synchronous pulley 233 drives the second synchronous pulley 2311 to rotate via the synchronous belt 2312. The second synchronous pulley 2311 is driven by the rotating column 2310, which drives the ball valve 222 to rotate. When the worm wheel 234 rotates, the limit rod 239 slides inside the arc groove 238, controlling the rotation angle of the worm wheel 234, so that the ball valve 222 rotates at a 90-degree angle.

[0021] In this embodiment, a limiting rod 239 is fixedly installed inside the fixed base 231, and an arc groove 238 is formed inside the worm gear 234. The limiting rod 239 slides inside the arc groove 238 to limit the rotation angle of the worm gear 234. The rotation angle of the worm gear 234 is limited by the physical trajectory of the arc groove 238.

[0022] In this embodiment, the brake disc 40 and brake mechanism 41 fixedly installed at the output end of the motor 3 are similar to a bicycle brake mechanism, in which the brake block driven by the linkage is pressed against the brake disc and decelerated and braked by friction.

[0023] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art. During operation, firstly, the control module 216 inputs a timed start signal and an start duration signal to the small motor 235. When the small motor 235 receives the timed start signal, it runs, driving the worm gear 236 to rotate. The worm gear 236 drives the worm wheel 234 to rotate. The worm wheel 234 drives the first synchronous pulley 233 to rotate via the rotating shaft 232. The first synchronous pulley 233 drives the second synchronous pulley 2311 to rotate via the synchronous belt 2312. The second synchronous pulley 2311 is driven by the rotating column 2310, which drives the ball valve 222 to rotate. When the worm wheel 234 rotates, the limit rod 239 slides inside the arc groove 238, controlling the rotation angle of the worm wheel 234, so that the ball valve 222 rotates at a 90-degree angle. Then, when the ball valve 222 rotates 90 degrees to open, the lubricating oil inside the oil tank 212 enters the reducer body 1 through the oil pipe 221.

[0024] Finally, when the small electric motor 235 receives the signal of the opening duration, the small electric motor 235 reverses the rotation of the ball valve 222 to close the inside of the oil pipe 221, thus completing the filling of lubricating oil. It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reducer for a straight-line single-output shaft oil pump, comprising a base (5), a motor (3) fixedly mounted on the top of the base (5), a brake disc (40) and a brake mechanism (41), and a drum coupling (4) fixedly mounted on the output end of the motor (3), a reducer body (1) fixedly mounted on the output end of the drum coupling (4), and a drive sprocket (6) fixedly mounted on the output end of the reducer body (1), wherein the motor (3), the drum coupling (4), the reducer body (1), and the drive sprocket (6) are arranged parallel to and coaxially, characterized in that: The reducer body (1) includes a housing (11) fixedly mounted on the top of the base (5). A high-speed shaft (12) is rotatably connected inside the housing (11), and a bearing bracket (13) is fixedly mounted inside the housing (11). A low-speed shaft (14) is rotatably mounted inside the bearing bracket (13). A set of gear rings (15) is rotatably mounted on the surface of the bearing bracket (13), and a planetary gear carrier (16) is rotatably mounted at one end of the bearing bracket (13). Three sets of planetary gears (17) are rotatably mounted in a circular array on the inner side of the planetary gear carrier (16). The planetary gears (17), the gear rings (15), and the high-speed shaft (14) are rotatably connected inside the base (5). The high-speed shaft (12) is meshed and installed, and the axes of the low-speed shaft (14) and the high-speed shaft (12) are parallel. The top of the reducer body (1) is provided with a lubrication mechanism (2) to realize the automatic lubrication of the gear inside the reducer body (1). The lubrication mechanism (2) includes: an oil injection unit (22) located inside the oil storage unit (21), including an oil pipe (221). A ball valve (222) is rotatably installed inside the oil pipe (221). The lubrication stored in the oil storage unit (21) is entered into the reducer body (1) by rotating the ball valve (222) to realize the automatic lubrication.

2. The reducer for an inline single-output shaft oil pump according to claim 1, characterized in that: The refueling mechanism (2) further includes: an oil storage unit (21), which is located on the top of the reducer body (1) and is used to store lubricating oil; and a drive unit (23), which is located on the right side of the oil storage unit (21) and is used to drive the rotation of the ball valve (222) to realize the opening and closing of the oil pipe (221).

3. The reducer for an inline single-output shaft oil pump according to claim 1, characterized in that: The oil storage unit (21) includes a base plate (211) fixedly installed on the top of the reducer body (1) by bolts, and an oil tank (212) is fixedly installed on the top of the base plate (211). The oil tank (212) is used to store lubricating oil, and an oil pipe (221) is fixedly installed through the base plate (211) and the arc-shaped connecting pad (20) to the inside of the oil tank (212).

4. The reducer for an inline single-output shaft oil pump according to claim 3, characterized in that: The oil storage tank (212) is provided with an observation window (213) on the front side, through which the level of lubricating oil inside the oil storage tank (212) can be observed. The top of the oil storage tank (212) is fixedly installed with a top cover (214) and a control module (216), and the right side of the oil storage tank (212) is fixedly installed with a side cover (215).

5. A reducer for an inline single-output shaft oil pump according to claim 2, characterized in that: The drive unit (23) includes a fixed base (231) fixedly installed on the top of the oil reservoir (212). A rotating shaft (232) is rotatably installed inside the fixed base (231). A first synchronous pulley (233) is fixedly installed on the right end of the rotating shaft (232). A rotating column (2310) is fixedly installed on the right side of the ball valve (222). The right end of the rotating column (2310) passes through the ball valve (222) and the oil reservoir (212) and is fixedly installed with a second synchronous pulley (2311). The second synchronous pulley (2311) is connected to the first synchronous pulley. A synchronous belt (2312) is installed between the synchronous pulleys (233). A small motor (235) is fixedly installed on the top of the reducer body (1), and a worm (236) is fixedly installed at the output end of the small motor (235). A worm wheel (234) is fixedly installed on the surface of the rotating shaft (232), and the worm wheel (234) and the worm (236) are meshed together. A bearing seat (237) is fixedly installed on the front side of the fixed seat (231), and the front end of the worm (236) rotates inside the bearing seat (237).

6. The reducer for an inline single-output shaft oil pump according to claim 5, characterized in that: A limiting rod (239) is fixedly installed inside the fixed base (231). An arc groove (238) is opened inside the worm gear (234), and the limiting rod (239) slides inside the arc groove (238) to limit the rotation angle of the worm gear (234).

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