Automatic lubrication system for central bearing seat of oil pumping unit and oil pumping unit

Abstract

The present invention relates to the technical field of oil pumping units, and discloses an automatic lubrication system for the central bearing seat of an oil pumping unit and an oil pumping unit. The automatic lubrication system for the central bearing seat of an oil pumping unit includes: a bracket, a rotating shaft is provided on the top; a walking beam, which is rotatably provided on the rotating shaft and forms a first lubrication chamber between the walking beam and the bracket; a first bearing, which is located in the first lubrication chamber and is sleeved on the rotating shaft, and the circumferential wall of the first bearing is also connected to the walking beam; the first bearing has a first mounting assembly for mounting the inner roller of the first bearing, and the first mounting assembly can rotate relative to the first bearing; an oil tank, which is connected to the first lubrication chamber through an oil inlet pipe assembly and is used to intermittently add lubricating oil to the first lubrication chamber; the rotating shaft has an oil return channel connected to the first lubrication chamber, and the oil return channel is connected to the oil tank through an oil return pipe. The oil pumping unit includes an automatic lubrication system for the central bearing seat of the oil pumping unit. The present invention can solve the technical problem of serious local wear caused by uneven force on the bearing rollers.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumping units, and in particular to an automatic lubrication system for a central bearing seat of an oil pumping unit and an oil pumping unit. Background Art

[0002] Pumping units are key equipment used to extract crude oil from oil wells during oil production. They are commonly found in onshore oil fields and offshore platforms. Their core function is to transmit surface power to the downhole pump, overcoming reservoir pressure and lifting crude oil to the surface.

[0003] The sliding bearing is the component that connects the bracket and the walking beam, allowing the walking beam to drive the donkey head to swing back and forth, achieving the purpose of oil extraction. During the reciprocating swing of the walking beam, the uneven force applied to the bearing rollers causes severe local wear, shortening the bearing's service life. Summary of the Invention

[0004] The present application discloses an automatic lubrication system for a central bearing seat of an oil pumping unit, so as to solve the technical problem in the related art that uneven force on bearing rollers leads to severe local wear.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present application discloses an automatic lubrication system for a central bearing seat of an oil pumping unit, comprising:

[0007] A bracket, with a rotating shaft provided on the top;

[0008] The walking beam is rotatably disposed on the rotating shaft and forms a first lubrication chamber between the walking beam and the bracket;

[0009] The first bearing is located in the first lubrication chamber and is sleeved on the rotating shaft, and the circumferential wall of the first bearing is also connected to the walking beam. The first bearing has a first mounting assembly for mounting the inner roller of the first bearing, and the first mounting assembly is rotatable relative to the first bearing.

[0010] an oil tank connected to the first lubrication chamber via an oil inlet pipe assembly and used for intermittently adding lubricating oil to the first lubrication chamber;

[0011] The rotating shaft has an oil return passage communicating with the first lubrication chamber, and the oil return passage is connected to the oil tank through an oil return pipe;

[0012] In the process of the lubricating oil entering the first lubricating chamber through the oil inlet pipe assembly, the lubricating oil drives the first mounting assembly to rotate, so as to change the position of the first bearing roller.

[0013] In some embodiments, the automatic lubrication system for the central bearing seat of the oil pumping unit further includes a first drive mechanism and an oil pumping mechanism;

[0014] The oil pumping mechanism is arranged in the oil tank, and the first driving mechanism is connected to the rocker and the oil pumping mechanism; during the reciprocating swing of the rocker, the first driving mechanism enables the oil pumping mechanism to drive the lubricating oil in the oil tank to intermittently enter the first lubrication chamber.

[0015] In some embodiments, the oil pumping mechanism includes a reciprocating screw and an oil pumping plate, the reciprocating screw is rotatably disposed in the oil tank and one end of the reciprocating screw is connected to the first drive mechanism, and the oil pumping plate is cooperatively disposed on the reciprocating screw;

[0016] During the reciprocating swing of the walking beam, the first driving mechanism causes the reciprocating screw to rotate, so that the oil pump plate moves toward the oil outlet of the oil tank or away from the oil outlet of the oil tank.

[0017] In some embodiments, the first drive mechanism includes a telescopic rod, a drive rod, and a gear;

[0018] One end of the telescopic rod is hinged to the bracket, and the other end is rotatably connected to the walking beam; the driving rod is connected to the fixed end of the telescopic rod, the gear is connected to the reciprocating screw rod through the pawl assembly, and the driving rod has external teeth that mesh with the gear.

[0019] In some embodiments, the pawl assembly includes a connecting ring and multiple pawls, the connecting ring is sleeved on the reciprocating screw, the multiple pawls are respectively rotatably arranged on the circumferential wall of the connecting ring through elastic members, and the inner wall of the gear is provided with multiple ratchet teeth that engage with the pawls.

[0020] In some embodiments, the rotating shaft is rotatably connected to the first bearing and the bracket to change the load-bearing position of the rotating shaft;

[0021] The automatic lubrication system for the central bearing seat of the oil pumping unit further includes a second drive mechanism connected to the reciprocating screw and the rotating shaft;

[0022] The reciprocating screw is rotated so that the second driving mechanism drives the rotating shaft to rotate intermittently.

[0023] In some aspects, the second drive mechanism includes a first sprocket, a second sprocket, a third sprocket, a chain, and a chain segment;

[0024] The first sprocket is connected to the end of the reciprocating screw rod, the second sprocket is rotatably arranged on the rotating shaft, and the chain is matched with the first sprocket and the second sprocket;

[0025] The third sprocket is connected to the rotating shaft and is coaxially arranged with the second sprocket. The chain segment is arranged on the chain. During the rotation of the chain, the chain segment intermittently contacts the third sprocket to drive the rotating shaft to rotate intermittently.

[0026] And / or, the automatic lubrication system for the central bearing seat of the oil pumping unit further includes a second bearing; a second lubrication chamber is provided at the connection between the rotating shaft and the bracket, the second bearing is located in the second lubrication chamber and is sleeved on the rotating shaft, and the circumferential wall of the second bearing is also connected to the bracket; the second bearing has a second mounting assembly for mounting an inner roller of the second bearing, and the second mounting assembly is rotatable relative to the second bearing;

[0027] The oil tank is also connected to the second lubrication chamber through the oil inlet pipe assembly. When the lubricating oil enters the first lubrication chamber through the oil inlet pipe assembly, the lubricating oil drives the second mounting assembly to rotate to change the position of the second bearing roller; the oil return channel is also connected to the second lubrication chamber.

[0028] In some embodiments, the oil inlet pipe assembly includes a first pipe, a second pipe, and a three-way valve; one end of the first pipe is in communication with the first lubrication chamber and / or the second lubrication chamber, and the other end is in communication with the first port of the three-way valve; one end of the second pipe is in communication with the first lubrication chamber and / or the second lubrication chamber, and the other end is in communication with the second port of the three-way valve; and the third port of the three-way valve is in communication with the oil outlet of the oil tank;

[0029] The three-way valve is used to control the flow of lubricating oil to the first lubrication chamber and / or the second lubrication chamber through the first pipeline or the second pipeline; when the lubricating oil flows to the first lubrication chamber and / or the second lubrication chamber through the first pipeline, the lubricating oil drives the first mounting assembly and / or the second mounting assembly to rotate in one of the clockwise and counterclockwise directions; when the lubricating oil flows to the first lubrication chamber and / or the second lubrication chamber through the second pipeline, the lubricating oil drives the first mounting assembly and / or the second mounting assembly to rotate in the other of the clockwise and counterclockwise directions.

[0030] In some embodiments, the first pipe has a first annular portion, the first annular portion is provided with a plurality of first spray heads at equal intervals, and the first annular portion is connected to the first lubrication chamber and / or the second lubrication chamber through the first spray heads;

[0031] And / or, the second pipeline has a second annular portion, the second annular portion is provided with a plurality of second nozzles at equal intervals, and the second annular portion is connected to the first lubrication chamber and / or the second lubrication chamber through the second nozzles;

[0032] and / or, the pitch of the reciprocating screw near the oil outlet of the oil tank is larger than the pitch of the reciprocating screw at other positions;

[0033] And / or, the oil tank has an oil pump cavity, and the cross-sectional area of ​​the oil pump cavity is smaller than the cross-sectional area of ​​other positions in the oil tank; the oil outlet of the oil tank is located in the oil pump cavity;

[0034] And / or, a guide rod is provided in the oil tank, and the guide rod extends along the moving direction of the oil pumping plate; the oil pumping plate is slidably arranged on the guide rod.

[0035] And / or, the first mounting assembly includes a first mounting frame and a plurality of first blades, the first mounting frame being used to mount the roller in the first bearing and being rotatably mounted on the first bearing; the plurality of first blades being equidistantly mounted on the first mounting frame along a circumferential direction of the first mounting frame;

[0036] And / or, the second mounting assembly includes a second mounting frame and a plurality of second fan blades, the second mounting frame is used to install the roller in the second bearing and is rotatably set on the second bearing; the plurality of second fan blades are equidistantly set on the second mounting frame along the circumference of the second mounting frame.

[0037] In a second aspect, the present application further discloses an oil pumping unit, comprising the automatic lubrication system for the central bearing seat of the oil pumping unit in the first aspect.

[0038] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0039] In the automatic lubrication system for the central bearing seat of the oil pumping unit of the present application, as the lubricating oil in the oil tank enters the first lubrication chamber through the oil inlet pipeline assembly, the lubricating oil drives the first mounting assembly to rotate, thereby changing the position of the first bearing roller, thereby preventing localized wear caused by the roller rolling in a fixed area for a long time. Furthermore, because the oil tank intermittently supplies oil to the first lubrication chamber, the roller in the first bearing adjusts its position at regular intervals. This not only prevents fatigue damage caused by the roller being retained in a high-stress area for a long time, but also breaks the rigid state of the boundary oil film through intermittent oil pressure shocks, maintaining the lubrication activity of the roller and the first bearing, achieving dual control of wear rate and heat accumulation at a lower energy cost, thereby improving the reliability and maintenance economy of the first bearing during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 This is the axonometric view of the automatic lubrication system of the central bearing seat of the oil pumping unit disclosed in some embodiments of the present application. Figure 1 ;

[0042] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0043] Figure 3 yes Figure 2 Enlarged view of point B in the middle;

[0044] Figure 4 yes Figure 2Enlarged view of point C in the middle;

[0045] Figure 5 This is the axonometric view of the automatic lubrication system of the central bearing seat of the oil pumping unit disclosed in some embodiments of the present application. Figure 2 ;

[0046] Figure 6 yes Figure 5 Enlarged view of point D in the middle;

[0047] Figure 7 This is a cross-sectional view of the automatic lubrication system for the central bearing seat of the oil pumping unit disclosed in some embodiments of the present application. Figure 1 ;

[0048] Figure 8 yes Figure 7 Enlarged view of point E in the middle;

[0049] Figure 9 yes Figure 7 Enlarged view of point F in the middle;

[0050] Figure 10 This is a cross-sectional view of the automatic lubrication system for the central bearing seat of the oil pumping unit disclosed in some embodiments of the present application. Figure 2 ;

[0051] Figure 11 yes Figure 10 Enlarged view of point G in the middle;

[0052] Figure 12 yes Figure 10 Enlarged view of point H in the middle;

[0053] Figure 13 This is an axonometric view of a partially hidden automatic lubrication system for a central bearing seat of an oil pumping unit disclosed in some embodiments of the present application;

[0054] Figure 14 yes Figure 13 The enlarged view of point I in the middle;

[0055] Figure 15 yes Figure 14 Enlarged view of J in the middle;

[0056] Figure 16 is a schematic diagram of the connection relationship between the first bearing and the rotating shaft disclosed in some embodiments of the present application;

[0057] Figure 17 It is an overall axonometric view of the oil pumping unit disclosed in some embodiments of the present application.

[0058] In the picture:

[0059] 100-Automatic lubrication system of the central bearing seat of the pumping unit, 110-Walking beam, 111-First lubrication chamber, 120-Bracket, 121-Second lubrication chamber, 130-Rotating shaft, 131-Oil return channel, 140-First bearing, 141-First mounting assembly, 142-First fan blade, 143-First mounting bracket, 144-Second bearing, 145-Second mounting assembly, 146-Second fan blade, 147-Second mounting bracket, 150-Oil tank, 151-Oil return pipeline, 152-Pump oil chamber, 153-Guide rod, 160-Oil inlet pipeline assembly, 161-First pipeline, 162- 2-second pipeline, 163-three-way valve, 164-first annular portion, 165-second annular portion, 166-first nozzle, 167-second nozzle, 170-first driving mechanism, 171-telescopic rod, 172-driving rod, 173-gear, 174-pawl assembly, 175-connecting ring, 176-pawl, 177-elastic member, 178-ratchet, 180-oil pumping mechanism, 181-reciprocating screw, 182-oil pumping plate, 190-second driving mechanism, 191-chain, 192-first sprocket, 193-third sprocket, 194-second sprocket, 195-chain segment;

[0060] 200-Oil pumping unit. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0062] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0063] The inventors discovered during use that during the pumping process, the walking beam drives the donkey head to swing back and forth within a certain angle to achieve the purpose of pumping oil. This reciprocating swing of the walking beam forces the bearing to rotate back and forth as well. This creates localized pressure on the bearing (primarily concentrated in the upper portion of the bearing), causing localized wear and shortening the bearing's service life.

[0064] The following is combined with Figures 1 to 17 , an automatic lubrication system 100 for a central bearing seat of an oil pumping unit and an oil pumping unit 200 provided in this application are described in detail through specific embodiments and their application scenarios.

[0065] Some embodiments of the present application disclose an automatic lubrication system 100 for the central bearing seat of an oil pumping unit, including a bracket 120, a walking beam 110, a first bearing 140, an oil tank 150, a rotating shaft 130, a first driving mechanism 170, an oil pumping mechanism 180, a second driving mechanism 190 and a second bearing 144.

[0066] like Figure 7 and Figure 8 As shown, a rotating shaft 130 is provided on the top of the bracket 120, and the walking beam 110 is rotatably provided on the rotating shaft 130. The walking beam 110 and the bracket 120 are connected by the rotating shaft 130, so that the walking beam 110 and the bracket 120 are installed and the walking beam 110 can rotate back and forth.

[0067] like Figure 8 As shown, a first lubrication chamber 111 is formed between the walking beam 110 and the bracket 120. The first bearing 140 is located in the first lubrication chamber 111 and is sleeved on the rotating shaft 130. The presence of the first lubrication chamber 111 not only continuously supplies lubricating oil to the first bearing 140 to reduce friction and wear between the rollers and the first bearing 140, but also forms a sealed barrier, effectively preventing external contaminants such as dust and sand from entering the interior of the first bearing 140, thereby increasing the service life of the first bearing 140.

[0068] like Figure 8 As shown, the circumferential wall of the first bearing 140 is connected to the walking beam 110. Since the circumferential wall of the first bearing 140 is connected to the walking beam 110, the bearing frame of the first bearing 140 can rotate relative to the roller during the swinging of the walking beam 110, thereby reducing the resistance to the swinging of the walking beam 110.

[0069] like Figure 8 and Figure 16As shown, the first bearing 140 includes a first mounting assembly 141 for mounting the roller within the first bearing 140. The first mounting assembly 141 is rotatable relative to the first bearing 140. The rotatable structure of the first mounting assembly 141 relative to the first bearing 140 allows the position of the roller to be adjusted by rotating the first mounting assembly 141, thereby preventing localized wear caused by the roller being fixed in a certain area and rolling for a long time.

[0070] like Figure 3 and Figure 6 As shown, the oil tank 150 is connected to the first lubrication chamber 111 via an oil inlet pipe assembly 160, which is used to intermittently add lubricating oil to the first lubrication chamber 111. The intermittent oil supply between the oil tank 150 and the first lubrication chamber 111 not only allows for precise on-demand replenishment of lubricating oil, avoiding energy waste or oil pressure imbalance caused by excessive oil supply, but also utilizes the intermittent flow of lubricating oil to achieve dynamic lubrication renewal, replenishing the oil film while removing frictional heat, thereby extending the service life of the first bearing 140.

[0071] As the lubricating oil in oil tank 150 enters first lubrication chamber 111 through oil inlet pipe assembly 160, it drives first mounting assembly 141 to rotate, thereby changing the position of the rollers of first bearing 140 and preventing localized wear caused by the rollers rolling in a fixed area for a long time. Furthermore, because oil tank 150 intermittently supplies oil to first lubrication chamber 111, the rollers in first bearing 140 adjust their positions at regular intervals. This not only prevents fatigue damage caused by the rollers being stuck in high-stress areas for a long time, but also breaks down the rigid state of the boundary oil film through intermittent oil pressure shocks, maintaining the lubrication activity of the rollers and first bearing 140. This achieves dual control of wear rate and heat accumulation at a lower energy cost, thereby improving the reliability and maintenance efficiency of first bearing 140 over long-term operation.

[0072] In this embodiment, the oil tank 150 is disposed on the bracket 120 , and the bracket 120 provides a mounting base for the oil tank 150 to ensure the stability of the overall structure.

[0073] As preferred in this embodiment, a one-way valve is directly provided between the oil inlet pipe assembly 160 and the oil outlet of the oil tank 150 to prevent the lubricating oil from flowing back.

[0074] like Figure 3 and Figure 8As shown, the rotating shaft 130 has an oil return passage 131 connected to the first lubrication chamber 111. The oil return passage 131 is connected to the oil tank 150 via an oil return pipe 151. The oil return passage 131, which is provided within the rotating shaft 130 and connected to the first lubrication chamber 111, forms a closed-loop lubrication system in conjunction with the oil tank 150. The oil return passage 131 actively directs used lubricating oil back to the oil tank 150, thereby circulating the lubricating oil and simultaneously removing heat from the first bearing 140 and the rotating shaft 130. Furthermore, the synergistic effect of dynamic reflux and intermittent oil supply maintains a stable oil pressure within the first lubrication chamber 111, ensuring continuous and uniform oil film coverage. This extends the combined lifespan of the lubricating oil and the first bearing 140 with low energy consumption and high reliability, reducing maintenance costs.

[0075] like Figure 10 and Figure 12 As shown, the oil pumping mechanism 180 is disposed within the oil tank 150, and the first drive mechanism 170 is connected to the walking beam 110 and the oil pumping mechanism 180. During the reciprocating swing of the walking beam 110, the first drive mechanism 170 causes the oil pumping mechanism 180 to drive the lubricating oil in the oil tank 150 to intermittently enter the first lubrication chamber 111. The oil pumping mechanism 180 is used to provide kinetic energy to the lubricating oil in the oil tank 150, allowing the lubricating oil to enter the first lubrication chamber 111 through the oil inlet pipe assembly 160. In addition, the kinetic energy of the reciprocating swing of the walking beam 110 is transmitted to the oil pumping mechanism 180 via the first drive mechanism 170, providing kinetic energy for the oil pumping mechanism 180, thereby avoiding reliance on external power, simplifying the structure, and enhancing system reliability.

[0076] like Figure 6 、 Figure 10 、 Figure 12 and Figure 13 As shown, the oil pumping mechanism 180 includes a reciprocating screw 181 and an oil pumping plate 182. The reciprocating screw 181 is rotatably mounted on the oil tank 150 and connected at one end to the first drive mechanism 170. The oil pumping plate 182 is cooperatively mounted on the reciprocating screw 181. During the reciprocating swing of the walking beam 110, the first drive mechanism 170 causes the reciprocating screw 181 to rotate, causing the oil pumping plate 182 to move toward or away from the oil outlet of the oil tank 150. As the oil pumping plate 182 moves toward the oil outlet of the oil tank 150, the lubricating oil near the oil outlet is forced out through the oil outlet by pressure, thereby pumping the oil.

[0077] It should be noted that the reciprocating screw 181 has a bidirectional symmetrical thread. During the rotation of the reciprocating screw 181, the oil pump plate 182 can automatically reverse when it moves to the end of the reciprocating screw 181, thereby causing the reciprocating screw 181 to rotate in one direction, and the oil pump plate 182 moves toward the oil outlet of the oil tank 150 or away from the oil outlet of the oil tank 150.

[0078] like Figure 12 As shown, the oil tank 150 has an oil pumping cavity 152, and the cross-sectional area of ​​the oil pumping cavity 152 is smaller than the cross-sectional areas of other locations on the oil tank 150. The oil outlet of the oil tank 150 is located in the oil pumping cavity 152. By providing the oil pumping cavity 152 with a smaller cross-sectional area and locating the oil outlet in the oil pumping cavity 152, the kinetic energy of the lubricating oil pumped out of the oil outlet is greater as the oil pumping plate 182 moves toward the oil outlet of the oil tank 150, thereby better driving the first mounting assembly 141 to rotate.

[0079] like Figure 12 As shown, the pitch of the reciprocating screw 181 near the oil outlet of the oil tank 150 is larger than the pitch of the reciprocating screw 181 at other locations. By setting a larger pitch in the section of the reciprocating screw 181 near the oil outlet of the oil tank 150, the corresponding oil pump plate 182 moves faster at the same speed, thereby forming a short high-pressure pulse near the oil outlet, quickly overcoming the oil flow inertia and increasing the instantaneous oil discharge volume.

[0080] like Figure 12 As shown, a guide rod 153 is provided within oil tank 150, extending along the direction of movement of oil pumping plate 182. Oil pumping plate 182 slides on guide rod 153. This design rigidly constrains the sliding path of oil pumping plate 182 through guide rod 153, ensuring precise movement of oil pumping plate 182 along a fixed axis. This results in smoother and more consistent reciprocating motion and maintains stable oil pumping volumetric efficiency.

[0081] like Figure 6 、 Figure 12 and Figure 14 As shown, the first drive mechanism 170 includes a telescopic rod 171, a drive rod 172, and a gear 173. One end of the telescopic rod 171 is hinged to the bracket 120, and the other end is rotatably connected to the walking beam 110. The drive rod 172 is connected to the fixed end of the telescopic rod 171, and the gear 173 is connected to the reciprocating screw 181 via a pawl assembly 174. The drive rod 172 has external teeth that mesh with the gear 173. The swing of the walking beam 110 drives the telescopic rod 171 to extend and retract, which in turn drives the drive rod 172 connected to its fixed end to swing. The engagement of the external teeth of the drive rod 172 with the gear 173 converts the swing into unidirectional rotation of the gear 173 (the pawl assembly 174 locks the reverse idle motion). The gear 173 then drives the reciprocating screw 181 to achieve precise intermittent propulsion.

[0082] The mechanical energy generated by the swing of the walking beam 110 is transferred to the reciprocating screw 181 through the cooperation of the telescopic rod 171, the driving rod 172 and the gear 173, so as to drive the reciprocating screw 181 to rotate. There is no need to set up an additional power source, thus avoiding external power dependence, simplifying the structure and enhancing system reliability.

[0083] In this embodiment, in order to facilitate the assembly of the gear 173 and the pawl assembly 174 , a mounting plate is provided on the bracket 120 , and the gear 173 is rotatably mounted on the mounting plate and is coaxially arranged with the pawl assembly 174 .

[0084] like Figure 14 and Figure 15 As shown, the pawl assembly 174 includes a connecting ring 175 and a plurality of pawls 176. The connecting ring 175 is sleeved on the reciprocating screw 181. The plurality of pawls 176 are rotatably mounted on the circumferential wall of the connecting ring 175 via elastic members 177. The inner wall of the gear 173 is provided with a plurality of ratchet teeth 178 that mesh with the pawls 176. When the walking beam 110 swings in one direction, upward or downward, the plurality of pawls 176 engage with the ratchet teeth 178, causing the reciprocating screw 181 to rotate synchronously with the gear 173. When the walking beam 110 swings in the other direction, the pawls 176 disengage from the ratchet teeth 178, causing the gear 173 to idle, thereby not driving the reciprocating screw 181 to rotate.

[0085] In this embodiment, the elastic member 177 is preferably a spring sheet.

[0086] like Figure 7 and Figure 9 As shown, the rotating shaft 130 is rotatably connected to the first bearing 140 and the bracket 120 to adjust the load-bearing position of the rotating shaft 130. As the rocker beam 110 swings, it constantly exerts localized pressure on the top area of ​​the rotating shaft 130, affecting the service life of the rotating shaft 130. Therefore, the rotatable design of the rotating shaft 130, the bracket 120, and the first bearing 140 allows the rotating shaft 130 to be adjusted in position, preventing the rotating shaft 130 from being fixed in a specific area for a long time, which may cause localized wear and stress concentration.

[0087] In this embodiment, since the rotating shaft 130 is provided with an oil return channel 131, and the oil return channel 131 passes through the oil return pipe 151 and the oil return channel 131, in order not to affect the rotation of the rotating shaft 130, the oil return pipe 151 is connected to the oil return channel 131 using a rotary joint.

[0088] like Figure 9As shown, the connection between the rotating shaft 130 and the bracket 120 has a second lubrication chamber 121, and the second bearing 144 is located in the second lubrication chamber 121 and is sleeved on the rotating shaft 130. To ensure the structural stability of the rotating shaft 130, both ends of the rotating shaft 130 are in contact with the bracket 120. Therefore, the second lubrication chamber 121 is provided at the connection between the rotating shaft 130 and the bracket 120. The presence of the second lubrication chamber 121 not only continuously supplies lubricating oil to the second bearing 144 to reduce friction and wear between the rollers and the second bearing 144, but also forms a sealed barrier, effectively preventing external contaminants such as dust and sand from entering the interior of the second bearing 144, thereby increasing the service life of the second bearing 144.

[0089] like Figure 9 As shown, the circumferential wall of the second bearing 144 is also connected to the bracket 120. Since the circumferential wall of the second bearing 144 is connected to the bracket 120, during the rotation of the rotating shaft 130, the bearing frame of the second bearing 144 can rotate relative to the roller, thereby reducing the resistance to the rotation of the rotating shaft 130.

[0090] like Figure 9 As shown, the second bearing 144 includes a second mounting assembly 145 for mounting the roller within the second bearing 144. The second mounting assembly 145 is rotatable relative to the second bearing 144. The rotatable structure of the second mounting assembly 145 relative to the second bearing 144 allows the position of the roller to be adjusted by rotating the second mounting assembly 145, thereby preventing localized wear caused by the roller being fixed in a certain area and rolling for a long time.

[0091] like Figure 2 and Figure 3 As shown, the oil tank 150 is further connected to the second lubrication chamber 121 via an oil inlet pipe assembly 160, for intermittently adding lubricating oil to the second lubrication chamber 121. The intermittent oil supply between the oil tank 150 and the second lubrication chamber 121 not only allows for precise, on-demand replenishment of lubricating oil, avoiding energy waste or oil pressure imbalance caused by excessive oil supply, but also utilizes the intermittent flow of lubricating oil to achieve dynamic lubrication renewal, replenishing the oil film while removing frictional heat, thereby extending the service life of the first bearing 140.

[0092] As the lubricating oil in oil tank 150 enters second lubrication chamber 121 through oil inlet conduit assembly 160, it drives second mounting assembly 145 to rotate, thereby changing the position of the rollers of second bearing 144 and preventing localized wear caused by the rollers rolling in a fixed area for a long time. Furthermore, because oil tank 150 intermittently supplies oil to second lubrication chamber 121, the rollers in second bearing 144 adjust their positions at regular intervals. This not only prevents fatigue damage caused by the rollers being stuck in high-stress areas for a long time, but also breaks down the rigid state of the boundary oil film through intermittent oil pressure shocks, maintaining the lubrication activity of the rollers and second bearing 144. This achieves dual control of wear rate and heat accumulation at a lower energy cost, thereby improving the reliability and maintenance efficiency of second bearing 144 during long-term operation.

[0093] like Figure 9 As shown, the oil return channel 131 is also connected to the second lubrication chamber 121. The oil return channel 131 can actively guide the used lubricating oil back to the oil tank 150 to realize the circulation of the lubricating oil and simultaneously take away the heat of the second bearing 144 and the rotating shaft 130; at the same time, the synergistic effect of dynamic reflux and intermittent oil supply maintains the stability of the oil pressure in the second lubrication chamber 121, ensures continuous and uniform coverage of the oil film, and extends the comprehensive life of the lubricating oil and the second bearing 144 in a low-energy, high-reliability manner, thereby reducing maintenance costs.

[0094] like Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 、 Figure 10 and Figure 12 As shown, the second drive mechanism 190 is connected to the reciprocating screw 181 and the rotating shaft 130. The reciprocating screw 181 rotates, so that the second drive mechanism 190 drives the rotating shaft 130 to rotate intermittently. By connecting the reciprocating screw 181 and the rotating shaft 130 through the second drive mechanism 190, as the walking beam 110 swings, the mechanical energy of the walking beam 110 is transmitted to the reciprocating screw 181 through the first drive mechanism 170, and then transmitted to the second drive mechanism 190 through the reciprocating screw 181, thereby causing the second drive mechanism 190 to drive the rotating shaft 130 to rotate intermittently to change the position of the rotating shaft 130. In addition, the driving power of the second drive mechanism 190 comes from the swinging of the walking beam 110, eliminating the need for an additional power source, avoiding external power dependence, simplifying the structure, and enhancing system reliability.

[0095] The first driving mechanism 170, the oil pumping mechanism 180 and the second driving mechanism 190 are linked together. While the first driving mechanism 170 drives the oil pumping mechanism 180 to intermittently provide lubricating oil to the first lubrication chamber 111 and the second lubrication chamber 121, it also drives the second driving mechanism 190 to intermittently rotate the rotating shaft 130, so that the positions of the first bearing 140, the second bearing 144 and the rotating shaft 130 change periodically, avoiding local wear and stress concentration caused by the first bearing 140, the second bearing 144 and the rotating shaft 130 being fixed in a certain area for a long time, and increasing the service life of the first bearing 140, the second bearing 144 and the rotating shaft 130.

[0096] like Figure 3 and Figure 4 As shown, the second driving mechanism 190 includes a first sprocket 192, a second sprocket 194, a third sprocket 193, a chain 191 and a chain segment 195; the first sprocket 192 is connected to the end of the reciprocating screw rod 181, the second sprocket 194 is rotatably set on the rotating shaft 130, and the chain 191 is matched with the first sprocket 192 and the second sprocket 194; the third sprocket 193 is connected to the rotating shaft 130 and is coaxially arranged with the second sprocket 194, and the chain segment 195 is arranged on the chain 191; during the rotation of the chain 191, the chain segment 195 intermittently contacts the third sprocket 193 to drive the rotating shaft 130 to rotate intermittently.

[0097] The second driving mechanism 190 drives the chain 191 to operate in conjunction with the reciprocating screw rod 181 through the first sprocket 192. The chain segment 195 provided on the chain 191 intermittently contacts the third sprocket 193 connected to the rotating shaft 130 during the circular motion; when the chain segment 195 is engaged with the third sprocket 193, the rotation of the first sprocket 192 is transmitted to the third sprocket 193 through the chain 191, the second sprocket 194 and the chain segment 195, so that the rotating shaft 130 rotates periodically and intermittently; when the chain segment 195 is disengaged from the third sprocket 193, the rotating shaft 130 stops rotating.

[0098] like Figure 3 As shown, the oil inlet pipeline assembly 160 includes a first pipeline 161, a second pipeline 162 and a three-way valve 163; one end of the first pipeline 161 is connected to the first lubrication chamber 111, and the other end is connected to the first port of the three-way valve 163; one end of the second pipeline 162 is connected to the first lubrication chamber 111, and the other end is connected to the second port of the three-way valve 163; the third port of the three-way valve 163 is connected to the oil outlet of the oil tank 150.

[0099] The three-way valve 163 is used to control the flow of lubricating oil to the first lubrication chamber 111 through the first pipe 161 or the second pipe 162; when the lubricating oil flows to the first lubrication chamber 111 through the first pipe 161, the lubricating oil drives the first mounting assembly 141 to rotate in one direction of clockwise and counterclockwise; when the lubricating oil flows to the first lubrication chamber 111 through the second pipe 162, the lubricating oil drives the first mounting assembly 141 to rotate in the other direction of clockwise and counterclockwise.

[0100] By shifting the direction of the lubricating oil flow, the first mounting assembly 141 is periodically driven forward and reverse, causing the roller to change its direction of operation. This results in more even distribution of force and friction, slowing material fatigue and extending the service life of the first bearing 140. Furthermore, this forward-reverse switching creates a turbulent flow within the first lubrication chamber 111, facilitating the lubricating oil's entry into blind spots and rebuilding the oil film, thereby preventing dry friction caused by an uneven oil film. Furthermore, the alternating forward and reverse flow of the lubricating oil helps flush out impurities such as metal chips and abrasive particles stuck in the first bearing 140.

[0101] Correspondingly, the first pipe 161 and the second pipe 162 are also connected to the second lubrication chamber 121. Similarly, the three-way valve 163 is also used to control the flow of lubricating oil to the second lubrication chamber 121 through the first pipe 161 or the second pipe 162. When the lubricating oil flows through the first pipe 161 to the second lubrication chamber 121, the lubricating oil drives the second mounting assembly 145 to rotate in one direction, clockwise or counterclockwise. When the lubricating oil flows through the second pipe 162 to the second lubrication chamber 121, the lubricating oil drives the second mounting assembly 145 to rotate in the other direction, clockwise or counterclockwise.

[0102] In this embodiment, the three-way valve 163 is preferably an electromagnetic three-way valve 163 to control the connection and closing of the first pipeline 161 and the second pipeline 162 with the oil outlet of the oil tank 150.

[0103] like Figure 8 and Figure 16 As shown, the first mounting assembly 141 includes a first mounting frame 143 and a plurality of first blades 142. The first mounting frame 143 is used to mount the rollers in the first bearing 140 and is rotatably mounted on the first bearing 140. The plurality of first blades 142 are equidistantly arranged on the first mounting frame 143 along the circumference of the first mounting frame 143. By equidistantly arranging the plurality of first blades 142 circumferentially on the first mounting frame 143, when lubricating oil flows through the first lubrication chamber 111, the first blades 142 are pushed by the oil pressure to rotate the first mounting frame 143 as a whole, forcing the rollers to periodically displace, achieving dynamic switching of the contact area, and thereby enhancing the service life of the first bearing 140. The equidistant distribution of the blades ensures a balanced driving torque and avoids rotational jamming.

[0104] like Figure 9 As shown, the second mounting assembly 145 includes a second mounting frame 147 and a plurality of second blades 146. The second mounting frame 147 is used to mount the rollers in the second bearing 144 and is rotatably mounted on the second bearing 144. The plurality of second blades 146 are equidistantly arranged on the second mounting frame 147 along the circumference of the second mounting frame 147. By equidistantly arranging the plurality of second blades 146 circumferentially on the second mounting frame 147, when lubricating oil flows through the first lubrication chamber 111, the second blades 146 are pushed by the oil pressure to drive the entire second mounting frame 147 to rotate, forcing the rollers to periodically displace, achieving dynamic switching of the contact area, and thereby extending the service life of the second bearing 144. The equidistant distribution of the blades ensures a balanced driving torque and avoids rotational jamming.

[0105] like Figure 10 and Figure 11 As shown, the first conduit 161 has a first annular portion 164, on which a plurality of first nozzles 166 are equidistantly disposed. The first annular portion 164 communicates with the first lubrication chamber 111 via the first nozzles 166. The first annular portion 164 and the plurality of first nozzles 166 equidistantly distributed circumferentially ensure uniform distribution of lubricating oil within the first lubrication chamber 111, thereby improving lubrication uniformity.

[0106] Correspondingly, the first annular portion 164 is also communicated with the second lubrication chamber 121 through the first nozzle 166 .

[0107] like Figure 10 and Figure 11 As shown, the second conduit 162 has a second annular portion 165, on which a plurality of second nozzles 167 are equidistantly disposed. The second annular portion 165 communicates with the first lubrication chamber 111 via the second nozzles 167. The second annular portion 165 and the plurality of second nozzles 167 equidistantly distributed circumferentially ensure uniform distribution of lubricating oil within the second lubrication chamber 121, thereby improving lubrication uniformity.

[0108] Correspondingly, the second annular portion 165 is also communicated with the second lubrication chamber 121 through the second nozzle 167 .

[0109] In this embodiment, the first nozzle 166 and the second nozzle 167 are tilted and aligned with the first fan blade 142 and the second fan blade 146 respectively, so that the pressure of the hydraulic oil sprayed from the first nozzle 166 and the second nozzle 167 can act on the first fan blade 142 and the second fan blade 146 to better drive the first mounting assembly 141 and the second mounting assembly 145 to rotate.

[0110] As a preferred embodiment of the present invention, both sides of the first blade 142 and the second blade 146 are arc-shaped, so as to be better impacted by the lubricating oil sprayed from the first nozzle 166 and the second nozzle 167, so as to better drive the first mounting assembly 141 and the second mounting assembly 145 to rotate.

[0111] Some embodiments of the present application also disclose an oil pumping unit 200, such as Figure 17 As shown, it includes an automatic lubrication system 100 for the central bearing seat of the oil pumping unit.

[0112] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0113] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0114] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. An automatic lubrication system for the central bearing seat of an oil pumping unit, characterized in that: include: A bracket, with a rotating shaft provided on the top; A walking beam, rotatably disposed on the rotating shaft and forming a first lubrication chamber between the walking beam and the bracket; a first bearing, located in the first lubrication chamber and sleeved on the rotating shaft, wherein a circumferential wall of the first bearing is further connected to the walking beam; the first bearing comprises a first mounting assembly for mounting an inner roller of the first bearing, the first mounting assembly being rotatable relative to the first bearing; an oil tank connected to the first lubrication chamber via an oil inlet pipe assembly and used for intermittently adding lubricating oil to the first lubrication chamber; a rotating shaft having an oil return passage communicating with the first lubrication chamber, wherein the oil return passage is connected to the oil tank via an oil return pipe; Wherein, in the process of lubricating oil entering the first lubrication chamber through the oil inlet pipe assembly, the lubricating oil drives the first mounting assembly to rotate, thereby changing the position of the first bearing roller; The automatic lubrication system for the central bearing seat of the oil pumping unit also includes a first driving mechanism and an oil pumping mechanism; The oil pumping mechanism is disposed in the oil tank, and the first driving mechanism is connected to the walking beam and the oil pumping mechanism; during the reciprocating swing of the walking beam, the first driving mechanism enables the oil pumping mechanism to drive the lubricating oil in the oil tank to intermittently enter the first lubrication chamber; The oil pumping mechanism includes a reciprocating screw and an oil pumping plate. The reciprocating screw is rotatably arranged on the oil tank and one end is connected to the first driving mechanism. The oil pumping plate is cooperatively arranged on the reciprocating screw. During the reciprocating swing of the walking beam, the first driving mechanism causes the reciprocating screw to rotate so as to move the oil pump plate toward or away from the oil outlet of the oil tank; The rotating shaft is rotatably connected to the first bearing and the bracket to change the load-bearing position of the rotating shaft; The automatic lubrication system for the central bearing seat of the oil pumping unit further includes a second driving mechanism connected to the reciprocating screw and the rotating shaft; wherein, the reciprocating screw is rotated so that the second driving mechanism drives the rotating shaft to rotate intermittently; The oil inlet pipeline assembly includes a first pipeline, a second pipeline and a three-way valve; one end of the first pipeline is connected to the first lubrication chamber, and the other end is connected to the first port of the three-way valve; one end of the second pipeline is connected to the first lubrication chamber, and the other end is connected to the second port of the three-way valve; the third port of the three-way valve is connected to the oil outlet of the oil tank; The three-way valve is used to control the flow of lubricating oil to the first lubrication chamber through the first pipe or the second pipe; when the lubricating oil flows to the first lubrication chamber through the first pipe, the lubricating oil drives the first mounting assembly to rotate in one of the clockwise and counterclockwise directions; when the lubricating oil flows to the first lubrication chamber through the second pipe, the lubricating oil drives the first mounting assembly to rotate in the other of the clockwise and counterclockwise directions.

2. The automatic lubrication system for the central bearing seat of an oil pumping unit according to claim 1 is characterized in that: The first driving mechanism includes a telescopic rod, a driving rod and a gear; One end of the telescopic rod is hinged to the bracket, and the other end is rotatably connected to the walking beam; the driving rod is connected to the fixed end of the telescopic rod, the gear is connected to the reciprocating screw rod through a pawl assembly, and the driving rod has external teeth that mesh with the gear.

3. The automatic lubrication system for the central bearing seat of an oil pumping unit according to claim 2 is characterized in that: The pawl assembly includes a connecting ring and a plurality of pawls. The connecting ring is sleeved on the reciprocating screw rod. The plurality of pawls are rotatably arranged on the circumferential wall of the connecting ring through elastic members. The inner wall of the gear is provided with a plurality of ratchet teeth engaged with the pawls.

4. The automatic lubrication system for the central bearing seat of an oil pumping unit according to claim 1 is characterized in that: The second drive mechanism includes a first sprocket, a second sprocket, a third sprocket, a chain and a chain segment; The first sprocket is connected to the end of the reciprocating screw rod, the second sprocket is rotatably arranged on the rotating shaft, and the chain is matched with the first sprocket and the second sprocket; The third sprocket is connected to the rotating shaft and is coaxially arranged with the second sprocket. The chain segment is arranged on the chain. During the rotation of the chain, the chain segment intermittently contacts the third sprocket to drive the rotating shaft to rotate intermittently. And / or, the automatic lubrication system for the central bearing seat of the oil pumping unit further includes a second bearing; a second lubrication chamber is provided at the connection between the rotating shaft and the bracket, the second bearing is located in the second lubrication chamber and is sleeved on the rotating shaft, and the circumferential wall of the second bearing is also connected to the bracket; the second bearing has a second mounting assembly for mounting an inner roller of the second bearing, and the second mounting assembly is rotatable relative to the second bearing; The oil tank is also connected to the second lubrication chamber through the oil inlet pipe assembly. In the process of the lubricating oil entering the first lubrication chamber through the oil inlet pipe assembly, the lubricating oil drives the second mounting assembly to rotate to change the position of the second bearing roller; the oil return channel is also connected to the second lubrication chamber.

5. The automatic lubrication system for the central bearing seat of an oil pumping unit according to claim 4 is characterized in that: One end of the first pipe is in communication with the second lubrication chamber, and the other end is in communication with the first port of the three-way valve; one end of the second pipe is in communication with the second lubrication chamber, and the other end is in communication with the second port of the three-way valve; the third port of the three-way valve is in communication with the oil outlet of the oil tank; The three-way valve is used to control the flow of lubricating oil to the second lubrication chamber through the first pipeline or the second pipeline; when the lubricating oil flows to the second lubrication chamber through the first pipeline, the lubricating oil drives the second mounting assembly to rotate in one of the clockwise and counterclockwise directions; when the lubricating oil flows to the second lubrication chamber through the second pipeline, the lubricating oil drives the second mounting assembly to rotate in the other of the clockwise and counterclockwise directions.

6. The automatic lubrication system for the central bearing seat of an oil pumping unit according to claim 5, characterized in that: The first pipe has a first annular portion, a plurality of first nozzles are equidistantly provided on the first annular portion, and the first annular portion is connected to the first lubrication chamber and / or the second lubrication chamber through the first nozzles; And / or, the second pipe has a second annular portion, a plurality of second nozzles are equidistantly provided on the second annular portion, and the second annular portion is connected to the first lubrication chamber and / or the second lubrication chamber through the second nozzles; and / or, the pitch of the reciprocating screw near the oil outlet of the oil tank is larger than the pitch of the reciprocating screw at other positions; And / or, the oil tank has an oil pump cavity, and the cross-sectional area of ​​the oil pump cavity is smaller than the cross-sectional area of ​​other positions of the oil tank; the oil outlet of the oil tank is located in the oil pump cavity; And / or, a guide rod is provided in the oil tank, the guide rod extends along the moving direction of the oil pumping plate; the oil pumping plate is slidably arranged on the guide rod; And / or, the first mounting assembly includes a first mounting frame and a plurality of first blades, the first mounting frame being used to mount the roller in the first bearing and being rotatably mounted on the first bearing; the plurality of first blades being equidistantly mounted on the first mounting frame along a circumferential direction of the first mounting frame; And / or, the second mounting assembly includes a second mounting frame and a plurality of second fan blades, the second mounting frame is used to install the roller in the second bearing and is rotatably set on the second bearing; the plurality of second fan blades are equidistantly arranged on the second mounting frame along the circumference of the second mounting frame.

7. A pumping unit, characterized in that: The invention comprises the automatic lubrication system for the central bearing seat of the oil pumping unit according to any one of claims 1 to 6.

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