Beam bearing block assembly of pumping unit with polytetrafluoroethylene sliding bearing and pumping unit

Abstract

The present application relates to pumping unit technical field, disclose the pumping unit beam bearing seat assembly with polytetrafluoroethylene sliding bearing and pumping unit. Pumping unit beam bearing seat assembly includes seat body and walking beam connection;Bearing is arranged in the seat body, the bearing is made of polytetrafluoroethylene;Cover plate is arranged on one side of the seat body axial;A plurality of fasteners are arranged along the circumference of the cover plate and are connected to the seat body and the cover plate;Fastener has first state and second state;Fastener can be converted between the first state and the second state. Pumping unit includes crank, main shaft, walking beam, power end and pumping unit beam bearing seat assembly, pumping unit beam bearing seat assembly is arranged at the tail of walking beam, one end of the crank is connected with the power end, the other end is connected with pumping unit beam bearing seat assembly through the main shaft. The present application solves the technical problem of uneven stress of bearing seat in related art, which leads to bolt fracture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pumping units, and particularly relates to a pumping unit beam bearing seat assembly with a polytetrafluoroethylene sliding bearing and a pumping unit. BACKGROUND

[0002] A pumping unit is a key equipment for extracting crude oil from an oil well in oil exploitation, and is commonly used in land oil fields and offshore platforms. The core function of the pumping unit is to transmit ground power to a downhole pump to overcome the pressure of an oil layer and lift crude oil to the ground.

[0003] The existing pumping unit comprises a motor, a speed reducer, a crank and a beam. The output shaft of the motor is connected to one end of the crank through the speed reducer. The beam bearing seat assembly is arranged at the tail end of the beam. The other end of the crank is connected to the beam bearing seat assembly through a main shaft, thereby driving the beam to reciprocatingly swing. However, the beam bearing seat assembly is unevenly stressed in the process of reciprocating swing, which easily leads to the fracture of the bolts on the bearing seat. SUMMARY

[0004] The present application discloses a pumping unit beam bearing seat assembly with a polytetrafluoroethylene sliding bearing and a pumping unit to solve the technical problem of uneven stress of the bearing seat in the related art, which leads to the fracture of the bolts.

[0005] To solve the above problems, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application discloses a pumping unit beam bearing seat assembly with a polytetrafluoroethylene sliding bearing, comprising:

[0007] a seat body configured to be connected to the tail end of the beam;

[0008] a bearing arranged in the seat body; the bearing is made of polytetrafluoroethylene;

[0009] a cover plate arranged on one side of the seat body in the axial direction;

[0010] a plurality of fasteners arranged along the circumference of the cover plate and connected to the seat body and the cover plate;

[0011] The fasteners have a first state and a second state. When the fasteners are in the first state, the cover plate is relatively static with the seat body. When the fasteners are in the second state, the cover plate can drive the plurality of fasteners to rotate relative to the seat body to change the positions of the plurality of fasteners. The fasteners can be converted between the first state and the second state.

[0012] In some embodiments, the cover plate comprises a cover plate body and an intermediate ring. One end of the intermediate ring is connected to the seat body in the axial direction, and the other end is connected to the cover plate body in a rotating manner.

[0013] The inner wall of the intermediate ring is in circumferential sliding connection with the plurality of fasteners, and the fasteners are switched between the first state and the second state along with the movement of the intermediate ring.

[0014] In some schemes, the fastener comprises an expansion sleeve and a bolt, the expansion sleeve is in rotational connection through the cover plate body and the intermediate ring, the bolt is connected with the expansion sleeve to expand the expansion sleeve; when the fastener is in the first state, the expansion sleeve is limited by the seat body; when the fastener is in the second state, the expansion sleeve is separated from the seat body.

[0015] And / or, the end surface of the seat body is provided with a mounting groove extending in the axial direction thereof, and the end portion of the intermediate ring extends into the mounting groove and is movable along the extension direction of the mounting groove.

[0016] In some schemes, the seat body is provided with a sliding groove in the circumferential direction thereof, and the end portion of the expansion sleeve extends into the sliding groove.

[0017] The sliding groove is provided with a stepped structure, and when the fastener is in the first state, the expansion sleeve is limited by the stepped structure; when the fastener is in the second state, the expansion sleeve is separated from the stepped structure.

[0018] In some schemes, the expansion sleeve comprises a sleeve body and a pressing block, the sleeve body is in circumferential sliding connection with the intermediate ring and has a mounting hole penetrating through the outer portion of the sleeve body, and the pressing block is arranged in the mounting hole; the bolt is arranged in the mounting hole, and along with the movement of the bolt, the bolt drives the pressing block to press the sleeve body to expand the sleeve body.

[0019] In some schemes, the mounting hole comprises a threaded portion and a connecting portion, the bolt is in threaded connection with the threaded portion, and the pressing block is arranged in the connecting portion.

[0020] And / or, at least one contact surface of the pressing block and the connecting portion is an inclined surface.

[0021] And / or, the pressing block is provided with a threaded hole corresponding to the bolt.

[0022] And / or, the outer side of the cover plate body is provided with a plurality of protruding structures in the circumferential direction, the protruding structures have through holes for connecting a crowbar.

[0023] And / or, the inner wall of the intermediate ring is provided with a guide groove in the circumferential direction thereof, and the outer wall of the sleeve body is provided with a connecting block, the connecting block is clamped in the guide groove and is movable along the extension direction of the guide groove.

[0024] In some schemes, the pumping unit beam bearing block assembly with a polytetrafluoroethylene sliding bearing further comprises a driving member connected with the intermediate ring for driving the movement of the intermediate ring.

[0025] In some schemes, the driving member comprises a screw rod and a plurality of guide rods, the screw rod is arranged on the outer wall of the seat body through the first connecting seat, the plurality of guide rods are arranged on the outer wall of the seat body through the second connecting seat, and the middle ring extends to the outside of the cover body and is connected with the screw rod and the plurality of guide rods.

[0026] In some schemes, the driving member further comprises a plug, the end of the screw rod and / or the guide rod is provided with a first locking hole, the seat body is provided with a second locking hole, when the fastener is in the first state, the first locking hole is aligned with the second locking hole, and the plug is inserted into the first locking hole and the second locking hole to limit the rotation of the screw rod.

[0027] And / or, the outer wall of the seat body is provided with a plurality of protective covers, and the screw rod and the plurality of guide rods are located in the protective covers.

[0028] In the second aspect, the application further discloses a pumping unit, comprising a crank, a main shaft, a beam, a power end and the pumping unit beam bearing seat assembly in the first aspect.

[0029] The pumping unit beam bearing seat assembly is arranged at the tail of the beam, one end of the crank is connected with the power end, and the other end is connected with the pumping unit beam bearing seat assembly through the main shaft.

[0030] The technical scheme adopted by the application can achieve the following beneficial effects:

[0031] The pumping unit beam bearing seat assembly of the application connects the seat body and the cover member through a plurality of fasteners which can be converted between the first state (locked) and the second state (rotated); in the second state, the cover member can be rotated as a whole to periodically change the circumferential position of all fasteners on the bonding surface, thereby balancing the alternating load borne by the fasteners. Moreover, the bearing made of polytetrafluoroethylene provides self-lubrication and buffering, achieving maintenance-free; and the replaceable fastener system actively homogenizes the fatigue stress, thereby significantly delaying the bolt fracture, and fundamentally improving the reliability and service life of the assembly. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0033] Figure 1 is the isometric view of the pumping unit beam bearing seat assembly with a polytetrafluoroethylene sliding bearing disclosed in some embodiments of the application;

[0034] Figure 2is the hidden part structure of the beam bearing seat assembly of the pumping unit with the polytetrafluoroethylene sliding bearing disclosed by some embodiments of the present application;

[0035] Figure 3 is the top view of the beam bearing seat assembly of the pumping unit with the polytetrafluoroethylene sliding bearing disclosed by some embodiments of the present application;

[0036] Figure 4 is Figure 3 is the cross-sectional view of the a-a plane in figure

[0037] Figure 5 is Figure 4 is the enlarged view of A in figure

[0038] Figure 6 is the isometric view of the expansion sleeve disclosed by some embodiments of the present application;

[0039] Figure 7 is the cross-sectional view of the expansion sleeve disclosed by some embodiments of the present application;

[0040] Figure 8 is the isometric view of the extrusion block disclosed by some embodiments of the present application;

[0041] Figure 9 is the isometric view of the pumping unit disclosed by some embodiments of the present application;

[0042] Figure 10 is Figure 9 is the enlarged view of B in figure

[0043] in the figure:

[0044] 100-pumping unit beam bearing seat assembly, 110-seat body, 111-mounting groove, 112-sliding groove, 1121-step structure, 113-protective cover, 120-cover plate, 121-cover plate body, 1211-protruding structure, 1212-through hole, 122-intermediate ring, 1221-guiding groove, 130-fastener, 131-expansion sleeve, 1311-sleeve body, 1312-extrusion block, 132-bolt, 133-mounting hole, 1331-threaded part, 1332-connection part, 134-threaded hole, 135-connection block, 140-driving part, 141-screw rod, 142-guiding rod, 143-latch, 150-bearing;

[0045] 200-pumping unit, 210-walking beam, 220-main shaft, 230-crank, 240-power end. DETAILED DESCRIPTION

[0046] Obviously, the embodiments described are only a part of all the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0047] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and are not limited in number, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the front and rear associated objects are in an "or" relationship.

[0048] The inventor found that the bearing block and its bolt group bear extremely complex alternating loads in the maintenance of the beam bearing block assembly of the pumping unit with a polytetrafluoroethylene sliding bearing. The swing of the pumping unit beam is not uniform motion, and the speed is slow and the acceleration is large near the upper and lower dead points, and the speed is fast in the middle stroke. This motion characteristic is transmitted to the bearing block hinge point through the connecting rod and the crank, so that the bearing block not only bears the huge load in the vertical direction from the sucker rod column, but also superimposes strong horizontal inertial force and impact force. More importantly, the size and direction of these forces change dramatically and periodically throughout the stroke cycle. When the beam swings to different positions, the stress state of the bolts changes from tension-dominant to shear-dominant, or a combination of the two. This alternating stress is the root cause of metal fatigue.

[0049] Secondly, the bearing block is usually fixed by multiple bolts. In an ideal case, all bolts share the load evenly. However, in reality, due to machining errors and uneven installation surfaces, it is easy to cause individual bolts to be overloaded, bearing loads exceeding their designed share. In addition, the thread root of the bolt is a natural stress concentration point, and micro-cracks are most likely to occur and gradually expand at this point under the repeated action of alternating loads. When most of the bolts are unloaded due to insufficient pre-tightening force or loosening, a few still working bolts will be quickly overloaded, accelerating the fatigue process, and eventually brittle fracture will occur.

[0050] The following will be described in conjunction with the accompanying drawings Figures 1 to 10The present application provides a detailed description of the oil pumping unit beam bearing housing assembly 100 with polytetrafluoroethylene sliding bearing and the oil pumping unit 200 through specific embodiments and application scenarios.

[0051] Some embodiments of this application disclose a pumping unit beam bearing housing assembly 100 with a polytetrafluoroethylene sliding bearing, including a housing 110, a cover plate 120, a plurality of fasteners 130 and a drive component 140.

[0052] like Figure 1 and Figure 4 As shown, the cover plate 120 is disposed on one side of the axial direction of the base 110, and multiple fasteners 130 are arranged circumferentially along the cover plate 120, connecting the base 110 and the cover plate 120. The arrangement of the cover plate 120 on one side of the axial direction of the base 110 and the use of multiple fasteners 130 arranged circumferentially along its side effectively bears and transmits the large alternating bending moment transmitted from the walking beam 210 to the main shaft 220. This structure allows tensile and compressive stresses to be evenly distributed through the circumferentially distributed fasteners 130 and the base 110 itself, avoiding excessive stress concentration in localized areas. This not only enhances the overall rigidity and stability of the base 110 but also effectively suppresses the potential separation tendency of the mating surface between the base 110 and the cover plate 120 in the tensile stress zone.

[0053] In this embodiment, there are two cover plate components 120, which are respectively connected to the two sides of the seat body 110 in the axial direction.

[0054] like Figure 3 , Figure 9 and Figure 10 As shown, the base 110 is used to connect with the walking beam 210 of the pumping unit 200. In this embodiment, the top of the base 110 is provided with a flange structure, and is fixedly connected to the tail end of the walking beam 210 by the flange structure and bolts 132.

[0055] The fasteners 130 have a first state and a second state. When the fasteners 130 are in the first state, the cover plate 120 is relatively stationary with respect to the seat body 110. When the fasteners 130 are in the second state, the cover plate 120 can drive the plurality of fasteners 130 to rotate with respect to the seat body 110 to change the positions of the plurality of fasteners 130. The fasteners 130 can be switched between the first state and the second state. By switching the plurality of fasteners 130 between the first state and the second state, the positions of the plurality of fasteners 130 can be periodically changed, so that each fastener 130 can be transferred from a region of tensile stress to a region of compressive stress or a region of less stress. By periodically changing the positions, the cumulative fatigue stress of all the fasteners 130 under long-term uneven alternating loads can be effectively balanced, and the situation that a specific bolt 132 continuously bears the maximum tensile stress in a fixed position can be broken, so that the stress relaxation and fatigue fracture process of the bolt 132 can be significantly delayed, and the failure resistance and maintainability of the seat body 110 can be fundamentally improved.

[0056] The bearing 150 is arranged in the seat body 110, and the bearing 150 is made of polytetrafluoroethylene. The bearing 150 is made of polytetrafluoroethylene (PTFE), and the dependence of a traditional rolling bearing 150 on regular grease lubrication is fundamentally eliminated by the inherent self-lubricating property and excellent chemical stability of the polytetrafluoroethylene, so that the maintenance-free purpose is achieved. At the same time, the good flexibility and low friction coefficient of the PTFE material can effectively buffer and homogenize the impact load and eccentric load generated in the working process, which not only greatly reduces the risk of abnormal wear and engagement, but also indirectly protects the fasteners 130, so that the peak stress borne by the fasteners 130 is more gentle, thereby cooperating with the design of the rotatable fasteners 130 to significantly improve the reliability and service life of the bearing seat assembly 100 of the beam of the oil pumping unit under harsh working conditions from the aspects of tribology and structural mechanics.

[0057] As preferred in the embodiment, the bearing 150 is a sliding bearing.

[0058] As Figure 4 and Figure 5As shown, the cover plate member 120 includes a cover plate body 121 and an intermediate ring 122, one end of the intermediate ring 122 is in axial sliding connection with the seat body 110, and the other end is in rotational connection with the cover plate body 121; the inner wall of the intermediate ring 122 is in circumferential sliding connection with the plurality of fasteners 130, and the plurality of fasteners 130 are converted between the first state and the second state along with the movement of the intermediate ring 122. When an axial pushing force is applied to the intermediate ring 122, the intermediate ring 122 slides axially along the seat body 110 and synchronously drives the plurality of fasteners 130 to move, and is synchronously converted from the first state of bearing working load to the second state of being freely rotatable, thereby preparing for subsequent position adjustment. When the fastener 130 is in the second state, since the plurality of fasteners 130 are in circumferential sliding connection with the intermediate ring 122, the plurality of fasteners 130 can be driven to change position by rotating the cover plate body 121. The operator only needs to drive the intermediate ring 122 to synchronously and accurately control the state switching of all fasteners 130, greatly improving the maintenance efficiency, and fundamentally ensuring the consistency and in-phase nature of the state and position adjustment of all bolts 132, effectively avoiding the stress concentration of the joint surface caused by the asynchronous force or state of individual bolts 132, thereby greatly improving the convenience.

[0059] As shown in Figure 5 , the end surface of the seat body 110 is provided with a mounting groove 111 extending in the axial direction thereof, and the end portion of the intermediate ring 122 extends into the mounting groove 111 and can move in the extension direction of the mounting groove 111. The mounting groove 111 provides guidance for the movement of the intermediate ring 122, strictly limits the sliding track of the intermediate ring 122, ensures the coaxiality and straightness of the axial movement thereof, thereby ensuring the synchronization and smooth action of the state conversion of all fasteners 130; and the cooperative connection of the intermediate ring 122 and the mounting groove 111 bears the radial component force and bending moment that may be generated during operation through the groove wall of the mounting groove 111, effectively prevents the intermediate ring 122 from being stuck or deflected during sliding, accurately guides the actuating force to the axial direction required for state conversion, and greatly improves the operation reliability, accuracy and structural rigidity of the entire mechanism.

[0060] As shown in Figure 5As shown, the fastener 130 includes an expansion sleeve 131 and a bolt 132, the expansion sleeve 131 is rotationally connected through the cover plate body 121 and the intermediate ring 122, and the bolt 132 is connected with the expansion sleeve 131 to expand the expansion sleeve 131; when the fastener 130 is in the first state, the expansion sleeve 131 is limited by the seat body 110, and when the fastener 130 is in the second state, the expansion sleeve 131 is separated from the seat body 110. When the fastener 130 needs to be in the first state, the bolt 132 is in a screwed state, which drives the expansion sleeve 131 to move axially, forces the expansion sleeve 131 to expand radially and tightly abuts against the wall of the matching hole of the seat body 110, and realizes the limiting and locking through the great friction force. When it needs to be converted to the second state, the intermediate ring 122 drives the plurality of expansion sleeves 131 to move, so that the contact surface of the expansion sleeve 131 is separated from the seat body 110, and then the cover plate body 121 can drive the expansion sleeve 131 to rotate, changing the position of the expansion sleeve 131.

[0061] The face contact friction locking of the expansion sleeve 131 replaces the simple thread tensioning of the traditional bolt 132, which not only ensures that the expansion sleeve 131 can withstand the great tensile stress caused by the bending moment, but also provides the convenience of periodic position adjustment without disassembly, perfectly balancing the bearing requirement and convenience.

[0062] As shown in the drawings, Figure 5 The seat body 110 is provided with a sliding groove 112 along the circumference thereof, and the end of the expansion sleeve 131 extends into the sliding groove 112; the sliding groove 112 is provided with a stepped structure 1121, the expansion sleeve 131 is limited by the stepped structure 1121 when the fastener 130 is in the first state, and the expansion sleeve 131 is separated from the stepped structure 1121 when the fastener 130 is in the second state. When the fastener 130 is in the first state, the expansion sleeve 131 expands under the action of the bolt 132, and the end thereof tightly abuts against the stepped structure 1121, forming a strong axial constraint. The mechanical limiting and the friction force between the expansion sleeve 131 and the hole wall synergistically act, greatly enhancing the overall rigidity and impact resistance of the connection, which can more effectively resist the great alternating bending moment transmitted by the walking beam 210. When converted to the second state, the expansion sleeve 131 is separated from the stepped structure 1121 under the driving of the intermediate ring 122, completely releasing the mechanical limiting, ensuring the smoothness and non-interference of subsequent position adjustment, which not only ensures the reliability of bearing, but also facilitates position adjustment.

[0063] As shown in the drawings, Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the expansion sleeve 131 comprises a sleeve body 1311 and an extrusion block 1312, the sleeve body 1311 is in circumferential sliding connection with the intermediate ring 122 and has a mounting hole 133 penetrating the outer portion of the sleeve body 1311, and the extrusion block 1312 is arranged in the mounting hole 133; the bolt 132 is arranged in the mounting hole 133, and with the movement of the bolt 132, the bolt 132 drives the extrusion block 1312 to extrude the sleeve body 1311 so as to expand the sleeve body 1311 outward. The axial tension of the bolt 132 is converted into uniform and controllable radial expansion force of the sleeve body 1311 by the extrusion block 1312. This expansion mode directly acting on the sleeve body 1311 by the internal extrusion block 1312 can generate great and uniform radial locking force, ensuring the formation of extremely stable surface contact locking with the stepped structure 1121 in the first state and effectively resisting alternating bending moment.

[0064] Specifically, as shown in Figure 7 and Figure 8 The contact surface between the extrusion block 1312 and the connecting portion 1332 is an inclined surface. As preferred in this embodiment, the contact surface between the extrusion block 1312 and the connecting portion 1332 is an inclined surface. The inclined surface can convert the axial tension of the bolt 132 into uniform radial expansion force of the sleeve body 1311, ensuring that the sleeve body 1311 can expand outward under the action of the extrusion block 1312.

[0065] Specifically, as shown in Figure 7 and Figure 8 The extrusion block 1312 is provided with a threaded hole 134 corresponding to the bolt 132. By providing the threaded hole 134 in the extrusion block 1312, the end of the bolt 132 is also connected with the threaded hole 134 of the extrusion block 1312 during the movement of the bolt 132 towards the extrusion block 1312, so that the bolt 132 can drive the extrusion block 1312 to advance to lock the sleeve body 1311 when it is screwed in, and when the bolt 132 is reversely rotated and moves away from the extrusion block 1312, the threads of the bolt 132 can actively and synchronously drive the extrusion block 1312 to reset, and the sleeve body 1311 can shrink inward under the action of its own elasticity after losing the expansion effect of the extrusion block 1312, so as to facilitate the separation of the cover plate 120 and the seat body 110.

[0066] Specifically, as shown in Figure 5 and Figure 6As shown, the inner wall of the intermediate ring 122 is provided with a guide groove 1221 along the circumference thereof, and the outer wall of the sleeve body 1311 is provided with a connecting block 135 which is clamped in the guide groove 1221 and can move along the extension direction of the guide groove 1221. By providing the guide groove 1221 on the inner wall of the intermediate ring 122, and connecting the sleeve body 1311 with the guide groove 1221 through the connecting block 135, it is ensured that the intermediate ring 122 can drive the plurality of sleeve bodies 1311 to move synchronously when the intermediate ring 122 slides in the axial direction, and it is also ensured that the plurality of sleeve bodies 1311 can smoothly slide along the guide groove 1221 under the driving of the cover plate body 121, thereby changing the position.

[0067] Specifically, as shown in Figure 1 The outer side of the cover plate body 121 is provided with a plurality of protruding structures 1211 along the circumference, and the protruding structures 1211 have through holes 1212 for connecting a crowbar. By uniformly distributing a plurality of protruding structures 1211 with through holes 1212 on the outer side of the cover plate body 121, a standardized, efficient and labor-saving force application point is provided for maintenance operation. These protruding structures 1211 enable the operator to use a standard tool such as a crowbar to easily insert into the through hole 1212 at any position, thereby providing a huge rotational torque for rotating the cover plate body 121 and the plurality of fasteners 130. This greatly overcomes the rotational resistance caused by residual friction and the weight of the parts, ensuring the operability, stability and controllability during position adjustment in the second state, making the maintenance work safer, more convenient, and reducing the requirement for the operator's physical strength.

[0068] As shown in Figure 7 The mounting hole 133 includes a threaded portion 1331 and a connecting portion 1332, the threaded portion 1331 is threadedly connected with the bolt 132, and the extrusion block 1312 is arranged on the connecting portion 1332. The threaded portion 1331 is connected with the bolt 132 to ensure accurate application and transmission of the pre-tightening force; and the connecting portion 1332 provides a containing space and a movement guide for the extrusion block 1312. The rotation of the bolt 132 is converted into accurate axial movement, which in turn acts on the radial deformation of the sleeve body 1311 through the extrusion block 1312, thereby avoiding the deflection, jamming or wear that may be caused by the direct contact between the bolt 132 and the extrusion block 1312, and ensuring the uniformity and reliability of the locking force application of the expansion sleeve 131 and the high controllability and consistency of the state conversion process.

[0069] As shown in Figure 2 The driving member 140 is connected with the intermediate ring 122 and is used to drive the movement of the intermediate ring 122. By providing the driving member 140 to directly drive the intermediate ring 122, it is convenient to drive the intermediate ring 122 to move in the axial direction of the seat body 110, thereby facilitating the fastener 130 to switch between the first state and the second state.

[0070] As shown in Figure 2 and Figure 4As shown, the driving member 140 includes a screw rod 141 and a plurality of guide rods 142, the screw rod 141 is arranged on the outer wall of the seat body 110 through a first connecting seat, the plurality of guide rods 142 are arranged on the outer wall of the seat body 110 through a second connecting seat, and the intermediate ring 122 extends to the outside of the cover plate body 121 and is connected with the screw rod 141 and the plurality of guide rods 142. When the screw rod 141 is rotated, the intermediate ring 122 which is threadedly connected with the screw rod 141 converts the rotating movement of the screw rod 141 into a smooth and straight movement along the axis of the seat body 110 under the accurate guidance and anti-rotation constraint of the plurality of guide rods 142, so as to synchronously control all the fasteners 130 to be converted between the first state and the second state through the connection with the expansion sleeve 131.

[0071] In the embodiment, the end of the screw rod 141 has a hexagonal recess structure, so that it can be quickly connected with a standard hexagonal driving head of a handheld electric wrench (or electric drill). The electric tool is started to efficiently drive the screw rod 141 to rotate, so as to convert a powerful and automatic torque into a precise and controllable axial linear movement of the intermediate ring 122, and finally synchronously control all the fasteners 130 to be reliably converted between the locking state and the adjustable state.

[0072] As shown in Figure 1 The outer wall of the seat body 110 is provided with a plurality of protective covers 113, and the screw rod 141 and the plurality of guide rods 142 are located in the protective covers 113. By adding the protective covers 113 to the screw rod 141 and the guide rods 142, it can effectively block the sand, dust, oil stains, moisture and other foreign matters in the scene from entering the threads and guide surfaces of the screw rod 141, so as to prevent the mechanism from being stuck, worn and damaged due to pollution, corrosion or accidental collision, thereby ensuring the long-term operation reliability, smoothness and service life of the driving system in harsh working conditions. At the same time, it also reduces the sensitivity of the equipment to the operating environment and reduces the need for daily cleaning and maintenance, thereby improving the maintenance-free performance and operation stability of the equipment as a whole.

[0073] As shown in Figure 2 and Figure 4As shown, the driving member 140 further comprises a latch 143, the end of the screw rod 141 and / or the guide rod 142 is provided with a first locking hole, the seat body 110 is provided with a second locking hole, when the fastener 130 is in the first state, the first locking hole is aligned with the second locking hole, and the latch 143 is inserted into the first locking hole and the second locking hole to limit the rotation of the screw rod 141. The latch 143 is inserted when the first locking hole of the screw rod 141 and / or the guide rod 142 is aligned with the second locking hole on the seat body 110, eliminating the possibility of any accidental rotation of the screw rod 141 in the vibration of the device in operation, thereby rigidly fixing the entire intermediate ring 122 and the fastener 130 mechanism linked thereto in the working position. This adds a second important safety insurance to the bearing seat that bears a large alternating bending moment, greatly enhancing its anti-vibration loosening ability and operation safety in long-term, harsh working conditions, ensuring the safety of the locking state.

[0074] In some schemes, the screw rod 141 is provided with a first locking hole.

[0075] In some schemes, the guide rod 142 is provided with a first locking hole.

[0076] In some schemes, the screw rod 141 and the guide rod 142 are both provided with a first locking hole.

[0077] Some embodiments of the present application also disclose an oil pumping machine 200, comprising a crank 230, a main shaft 220, a beam 210, a power end 240 and the pumping machine beam bearing seat assembly 100 with polytetrafluoroethylene sliding bearings.

[0078] As shown in Figure 2 , Figure 9 and Figure 10 , the pumping machine beam bearing seat assembly 100 with polytetrafluoroethylene sliding bearings is arranged at the tail of the beam 210, one end of the crank 230 is connected with the power end 240, and the other end is connected with the pumping machine beam bearing seat assembly 100 with polytetrafluoroethylene sliding bearings through the main shaft 220. The power of the power end 240 is transmitted to the main shaft 220 through the crank 230, driving the main shaft 220 to make a circular motion, and the main shaft 220 drives the tail beam 210 to swing back and forth, thereby converting the rotary power into the reciprocating swing of the beam 210.

[0079] In the present embodiment, the power end 240 is a motor and a speed reducer, and the output shaft of the motor is connected with the crank 230 through the speed reducer.

[0080] It should be noted that, as used herein, the terms "includes," "including," or "has" are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements is not limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a... " does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0081] Furthermore, it is to be understood that the scope of the present application is not limited to the particular details of the methods and apparatus described herein, and that various modifications can be made without departing from the scope of the application. For example, although the method steps are described in a particular order, alternative embodiments can perform the method steps in a different order, or perform different steps, or perform the method steps in parallel, or add, remove, or combine steps. Furthermore, features described in relation to one example can be combined with features described in relation to other examples.

[0082] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A beam bearing pedestal assembly for a pumping unit having a polytetrafluoroethylene sliding bearing, characterized by, The utility model relates to a bearing seat assembly of pumping unit beam, comprising: a seat body for connecting with the tail end of the beam; a bearing arranged in the seat body; the bearing is made of polytetrafluoroethylene; a cover plate arranged on one side of the seat body in the axial direction; a plurality of fasteners arranged along the circumference of the cover plate and connecting the seat body and the cover plate; wherein the fastener has a first state and a second state, when the fastener is in the first state, the cover plate is relatively static with the seat body, when the fastener is in the second state, the cover plate can drive a plurality of fasteners to rotate relative to the seat body to change the position of a plurality of fasteners; the fastener can be converted between the first state and the second state.

2. The beam and bearing assembly for pumping units with TFE sliding bearings according to claim 1, characterized in that the cover plate comprises a cover plate body and an intermediate ring, one end of the intermediate ring is connected with the seat body in the axial direction, and the other end is connected with the cover plate body in rotation; the inner wall of the intermediate ring is connected with a plurality of fasteners in the circumferential direction, and the fasteners are converted between the first state and the second state with the movement of the intermediate ring.

3. The beam and bearing assembly for a pumping unit with a Teflon sliding bearing as set forth in claim 2, wherein, the fastener comprises an expansion sleeve and a bolt, the expansion sleeve is connected with the cover plate body and the intermediate ring in rotation, the bolt is connected with the expansion sleeve to expand the expansion sleeve; when the fastener is in the first state, the expansion sleeve is limited by the seat body, when the fastener is in the second state, the expansion sleeve is separated from the seat body; and / or, the end surface of the seat body is provided with a mounting groove extending in the axial direction, the end of the intermediate ring extends into the mounting groove and can move along the extension direction of the mounting groove.

4. The beam and bearing assembly for pumping units with Teflon sliding bearings of claim 3, characterized in that the seat body is provided with a sliding groove in the circumferential direction, and the end of the expansion sleeve extends into the sliding groove; the sliding groove is provided with a stepped structure, when the fastener is in the first state, the expansion sleeve is limited by the stepped structure, when the fastener is in the second state, the expansion sleeve is separated from the stepped structure.

5. The beam and bearing assembly for pumping units with Teflon sliding bearings of claim 3, characterized in that, the expansion sleeve comprises a sleeve body and a pressing block, the sleeve body is connected with the intermediate ring in the circumferential direction and has a mounting hole penetrating through the outer part of the sleeve body, and the pressing block is arranged in the mounting hole; the bolt is arranged in the mounting hole, and the bolt drives the pressing block to press the sleeve body to expand the sleeve body with the movement of the bolt.

6. A beam and pedestal assembly for a pumping unit having a TFE bearing, as defined in claim 5, wherein the mounting hole comprises a threaded part and a connecting part, the bolt is screwed with the threaded part, and the pressing block is arranged in the connecting part; and / or, at least one contact surface of the pressing block and the connecting part is an inclined surface; and / or, the pressing block is provided with a threaded hole corresponding to the bolt; and / or, the outer side of the cover plate body is provided with a plurality of convex structures in the circumferential direction, the convex structures have through holes for connecting crowbars; and / or, the inner wall of the intermediate ring is provided with a guide groove in the circumferential direction, the outer wall of the sleeve body is provided with a connecting block, the connecting block is clamped in the guide groove and can move along the extension direction of the guide groove.

7. A beam-bridge bearing assembly for a pumping unit with a sliding bearing of polytetrafluoroethylene according to claim 2, characterized in that the bearing seat assembly of pumping unit beam further comprises a driving member connected with the intermediate ring for driving the movement of the intermediate ring.

8. A beam-bridge bearing assembly for a pumping unit with a polytetrafluoroethylene sliding bearing as claimed in claim 7, characterized in that The driving member comprises a screw rod and a plurality of guide rods, the screw rod is arranged on the outer wall of the seat body through a first connecting seat, the plurality of guide rods are arranged on the outer wall of the seat body through a second connecting seat, and the intermediate ring extends to the outside of the cover plate body and is connected with the screw rod and the plurality of guide rods.

9. A beam-bridge bearing assembly for a pumping unit with a polytetrafluoroethylene sliding bearing as claimed in claim 8, characterized in that The driving member further comprises a plug, the end of the screw rod and / or the guide rod is provided with a first locking hole, the seat body is provided with a second locking hole, when the fastener is in the first state, the first locking hole is aligned with the second locking hole, and the plug is inserted into the first locking hole and the second locking hole to limit the rotation of the screw rod. And / or, the outer wall of the seat body is provided with a plurality of protective covers, and the screw rod and the plurality of guide rods are located in the protective covers.

10. A pumping unit characterized by, The pumping unit beam bearing seat assembly comprises a crank, a main shaft, a beam, a power end and the pumping unit beam bearing seat assembly of any one of claims 1-9. The pumping unit beam bearing seat assembly is arranged at the tail of the beam, one end of the crank is connected with the power end, and the other end is connected with the pumping unit beam bearing seat assembly through the main shaft.

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