High-sealing-performance bearing for oil pumping unit
By using self-sealed double-row tapered roller bearings and rubber sealing rings in the walking beam pumping unit bearings, a double-layer sealing structure is formed, which solves the problem of insufficient bearing sealing, achieves long-term maintenance-free period, reduces safety risks and operating difficulty, and provides long-lasting lubrication effect.
Patent Information
- Application Number
- CN202423034536.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-10
AI Technical Summary
The existing walking beam pumping unit has insufficient bearing sealing, which leads to grease leakage and accelerated wear, frequent maintenance, and difficulty in operation in harsh environments such as high temperature, high speed, humidity, and dust, posing high safety risks.
The use of self-sealed double-row tapered roller bearings, spherical roller bearings and rubber sealing rings in conjunction with the end covers forms a double-layer dustproof and waterproof structure to ensure the high sealing performance of the bearings. The sealing rings provided by the bearings are combined with the bearing seats to form a seal, which increases the storage space for grease and avoids leakage and external contamination.
The bearings are maintenance-free for a long period of more than 8 years, ensuring that grease does not leak and preventing external dust and moisture from entering, providing long-lasting lubrication effects and reducing safety risks and operational difficulties.
Smart Images
Figure CN223447499U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to oilfield production equipment technical field, especially a kind of high sealing performance's bearing for pumping unit. BACKGROUND
[0002] At present, beam pumping unit central bearing, tail bearing and crank pin bearing all adopt ordinary cylindrical roller bearing, and its structure is ordinary open type (without sealing element). Since ordinary cylindrical roller bearing is not strong in sealing, the lubrication maintenance of beam pumping unit bearing is generally required to maintain and add lubricating grease after 5000h continuous operation. Bearing is installed in bearing seat, when installing bearing, appropriate amount of lubricating grease is injected into bearing seat, and bearing seat cover is used for sealing. After reaching the continuous operation time, pumping unit needs to be stopped, and appropriate amount of lubricating grease is re-injected through manual operation to open bearing seat or through grease nipple.
[0003] Bearing for beam pumping unit all adopts ordinary open type (without sealing element), and the lubrication of ordinary open type bearing is largely dependent on the sealing performance of assembly end cover. Sealing failure, lubricating grease leakage and pollution will accelerate the wear of bearing. In the face of high temperature, high speed, humidity, dust and other harsh environments and limited lubrication operation space, the lubrication maintenance of beam pumping unit bearing is generally required to maintain and add lubricating grease after 5000h continuous operation. Such ordinary bearing needs regular high-altitude operation for lubricating grease injection and maintenance, which has high safety risk and large operation difficulty.
[0004] Beam pumping unit central bearing, tail bearing and crank pin bearing are all of ordinary open type structure without sealing element, and the sealing performance is insufficient, and the maintenance-free period is short. How to solve the above problems is the research subject of the present scheme. UTILITY MODEL CONTENTS
[0005] In order to achieve the above utility model purposes, in view of the above technical problems, the utility model provides a kind of high sealing performance's bearing for pumping unit.
[0006] Its technical scheme is to include bearing inner ring, bearing outer ring, bearing self-contained sealing ring, end cover, rubber sealing ring and positioning assembly;
[0007] The bearing inner ring is matched with shaft, the bearing outer ring is matched with bearing seat, and the bearing self-contained sealing ring is fixedly arranged on the bearing outer ring;
[0008] The end cover is fixed on the bearing seat, and the two sides of the bearing outer ring are matched with the end cover of the bearing seat respectively.
[0009] The bearing includes central shaft bearing, tail shaft bearing and crank pin shaft bearing.
[0010] The central shaft bearing is a double-row tapered roller bearing with a sealing ring, the stern shaft bearing is a self-sealing angular contact roller bearing, and the stern shaft bearing is a self-sealing angular contact roller bearing.
[0011] The shaft includes a central shaft, a stern shaft, and a crank pin shaft.
[0012] The bearing self-sealing ring includes a bearing self-sealing ring one, a bearing self-sealing ring two, and a bearing self-sealing ring three.
[0013] The bearing seat end cover includes an end cover one, an end cover two, and an end cover three.
[0014] The bearing seat includes a bearing seat one, a bearing seat two, and a bearing seat three.
[0015] The rubber sealing ring includes a rubber sealing ring one, a rubber sealing ring two, and a rubber sealing ring three.
[0016] The central shaft bearing inner ring is matched with the central shaft, and the central shaft bearing outer ring is matched with the bearing seat one.
[0017] The bearing self-sealing ring one is fixed on the central shaft bearing outer ring.
[0018] The central shaft bearing further includes a bearing self-sealing seat.
[0019] The bearing self-sealing seat is fixed on the inner ring of the central shaft bearing.
[0020] The bearing self-sealing ring one of the central shaft bearing is matched with the bearing self-sealing seat to form a seal.
[0021] The two sides of the central shaft bearing outer ring are respectively matched with the end cover one.
[0022] The end cover one is fixed on the bearing seat one, and the end cover one is sealed with the rubber sealing ring one between the end cover one and the central shaft.
[0023] The positioning assembly of the central shaft bearing includes a positioning sleeve, which is sleeved on the central shaft and matched with the bearing self-sealing seat on one side to play a positioning role.
[0024] The end cover one on both sides of the bearing seat is increased in depth, and the structure of the end cover one is correspondingly changed to cancel the original middle steps of the bearing seat and the shaft.
[0025] The stern shaft bearing inner ring is matched with the stern shaft, and the stern shaft bearing outer ring is matched with the bearing seat two.
[0026] The bearing self-sealing ring two is fixed on the stern shaft bearing outer ring.
[0027] The bearing self-sealing ring two is matched with the stern shaft bearing inner ring to form a seal.
[0028] The outer ring of the tail shaft bearing is matched with the end cover two on both sides;
[0029] The end cover two is fixed on the bearing seat two, and the bearing seat two is sealed with the rubber sealing ring two between the end cover two and the tail shaft.
[0030] The positioning assembly of the tail shaft bearing comprises a positioning nut, which is fixed on one side of the tail shaft through threads and matched with the inner ring of the tail shaft bearing to play a positioning role.
[0031] The space between the tail shaft bearing and the end cover two is filled with general lithium-based lubricating grease with high consistency, so that the sealing performance of the bearing is further improved.
[0032] The inner ring of the crank pin shaft bearing is matched with the crank pin shaft, and the outer ring of the crank pin shaft bearing is matched with the bearing seat three;
[0033] The self-sealing ring three of the bearing is fixed on the outer ring of the crank pin shaft bearing;
[0034] The self-sealing ring three of the bearing is matched with the inner ring of the crank pin shaft bearing to form a seal;
[0035] The outer ring of the crank pin shaft bearing is matched with the end cover three and the bearing seat three on both sides;
[0036] The end cover three is fixed on the bearing seat three, and the bearing seat three is sealed with the rubber sealing ring three between the end cover three and the crank pin shaft.
[0037] The positioning assembly of the crank pin shaft bearing comprises a bearing cover plate and a bolt, the bearing cover plate is fixed on one end of the crank pin shaft through the bolt and matched with one side of the crank pin shaft bearing to play a positioning role.
[0038] The space between the crank pin shaft bearing and the end cover three is filled with general lithium-based lubricating grease with high consistency, so that the sealing performance of the bearing is further improved.
[0039] The bearing assembly is required to meet the maintenance-free requirement for more than 8 years, the bearing and the bearing seat can meet the automatic aligning function, the lubricating grease suitable for the working condition of the bearing is preferably selected, the bearing raceway and the retainer structure are beneficial to the storage of the lubricating grease and do not have dead angles, the sealing reliability is ensured, the leakage of the lubricating grease is prevented, the infiltration of external dust, oil and water is avoided, and more durable lubrication can be provided.
[0040] The technical scheme provided by the embodiment of the utility model has the beneficial effects that the scheme provides a bearing with high sealing performance for a pumping unit, the bearing with a self-sealing function is directly installed in the bearing seat, the self-sealing function and the rubber sealing ring are matched with the end cover or the bearing seat to form a double-layer dustproof and waterproof structure, efficient dustproof and waterproof effects are achieved, the maintenance-free bearing assembly is used, the central bearing, the tail bearing and the crank pin bearing of the beam-pumping unit can be maintained for a long period without maintenance, and the purpose is achieved.
[0041] The bearing overall requirement can meet maintenance-free for more than 8 years; the bearing and the bearing seat can meet the automatic aligning function; the lubricating grease suitable for the working condition of the bearing is preferred, the bearing raceway and the retainer structure are beneficial to the storage of the lubricating grease and do not have dead angles; the sealing reliability is ensured, the lubricating grease leakage is prevented, the external dust, oil and water are avoided from entering, and more durable lubrication can be provided. BRIEF DESCRIPTION OF DRAWINGS
[0042] Fig. 1 It is a schematic structural diagram of a central shaft maintenance-free rolling bearing assembly structure for the pumping unit.
[0043] Fig. 2 It is a schematic structural diagram of a tail shaft maintenance-free rolling bearing assembly structure for the pumping unit.
[0044] Fig. 3 It is a schematic structural diagram of a crank pin shaft maintenance-free rolling bearing assembly structure for the pumping unit.
[0045] Wherein, the reference signs are: 1, bearing seat one; 2, end cover one; 3, bearing self-contained sealing seat; 4, positioning sleeve; 5, central shaft; 6, rubber sealing ring one; 7, bearing self-contained sealing ring one; 8, central shaft bearing; 9, bearing seat two; 10, end cover two; 11, positioning nut; 12, tail shaft; 13, rubber sealing ring two; 14, bearing self-contained sealing ring two; 15, tail shaft bearing; 16, end cover three; 17, bearing cover plate; 18, bearing seat three; 19, rubber sealing ring three; 20, crank pin shaft; 21, bearing self-contained sealing ring three; 22, crank pin shaft bearing. DETAILED DESCRIPTION
[0046] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and embodiments. Of course, the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0047] It should be noted that the embodiments in the utility model creation and the features in the embodiments can be combined with each other without conflict.
[0048] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0049] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0050] Embodiment 1
[0051] Referring to Figs. 1 to 3 The utility model provides a high sealing performance's bearing for pumping unit, including bearing inner race, bearing outer ring, bearing self -sealing ring, end cover, rubber seal ring and positioning assembly,
[0052] Bearing inner race is coordinated with the shaft, bearing outer ring is coordinated with the bearing seat, bearing self -sealing ring fixedly arranged on bearing outer ring,
[0053] End cover is fixed on the bearing seat, and the two sides of the bearing outer ring are matched with the end cover of the bearing seat.
[0054] The bearing includes a central shaft bearing 8, a tail shaft bearing 15, and a crank pin shaft bearing 22.
[0055] The central shaft bearing 8 is a double-row tapered roller bearing with a self-sealing function, the tail shaft bearing 15 is a self-sealing self-aligning roller bearing, and the tail shaft bearing 15 is a self-sealing self-aligning roller bearing.
[0056] The shaft includes a central shaft 5, a tail shaft 12, and a crank pin shaft 20.
[0057] Bearing self-sealing ring includes bearing self-sealing ring one 7, bearing self-sealing ring two 14, bearing self-sealing ring three 21;
[0058] End cap of bearing pedestal includes end cap one 2, end cap two 10, end cap three 16;
[0059] Bearing pedestal includes bearing pedestal one 1, bearing pedestal two 9, bearing pedestal three 18;
[0060] Rubber sealing ring includes rubber sealing ring one 6, rubber sealing ring two 13, rubber sealing ring three 19.
[0061] Example 2
[0062] Referring to Fig. 1 On the basis of example 1, the inner ring of the central shaft bearing 8 is matched with the central shaft 5, and the outer ring of the central shaft bearing 8 is matched with the bearing pedestal one 1.
[0063] The bearing self-sealing ring one 7 is fixed on the outer ring of the central shaft bearing 8.
[0064] The central shaft bearing 8 further includes a bearing self-sealing seat 3.
[0065] The bearing self-sealing seat 3 is fixed on the inner ring of the central shaft bearing 8.
[0066] The bearing self-sealing ring one 7 of the central shaft bearing 8 is matched with the bearing self-sealing seat 3 to form a seal.
[0067] The outer ring of the central shaft bearing 8 is matched with the end cap one 2 on both sides.
[0068] The end cap one 2 is fixed on the bearing pedestal one 1, and the end cap one 2 is sealed with the rubber sealing ring one 6 between the end cap one 2 and the central shaft 5.
[0069] The positioning assembly of the central shaft bearing 8 includes a positioning sleeve 4, which is sleeved on the central shaft 5 and matched with the bearing self-sealing seat 3 on one side to play a positioning role.
[0070] Example 3
[0071] On the basis of example 2, the end cap one 2 on both sides of the bearing pedestal is increased in depth, and the structure of the end cap one 2 is changed accordingly, and the original middle steps of the bearing pedestal and the shaft are cancelled.
[0072] Example 4
[0073] Referring to Fig. 2 On the basis of example 1, the inner ring of the tail shaft bearing 15 is matched with the tail shaft 12, and the outer ring of the tail shaft bearing 15 is matched with the bearing pedestal two 9.
[0074] The bearing self-sealing ring two 14 is fixed on the outer ring of the tail shaft bearing 15.
[0075] The bearing self-sealing ring two 14 cooperates with the inner ring of the tail shaft bearing 15 to form a seal.
[0076] The outer ring of the tail shaft bearing 15 cooperates with the end cover two 10 on both sides.
[0077] The end cover two 10 is fixed on the bearing seat two 9, and the end cover two 10 and the tail shaft 12 are sealed by the rubber sealing ring two 13.
[0078] The positioning assembly of the tail shaft bearing 15 comprises a positioning nut 11, which is fixed on the tail shaft 12 through threads and cooperates with the inner ring of the tail shaft bearing 15 on one side to play a positioning role.
[0079] Example 5
[0080] On the basis of example 4, the space between the tail shaft bearing 15 and the end cover two 10 is filled with general lithium-based lubricating grease with high consistency, so as to further increase the sealing performance of the bearing.
[0081] Example 6
[0082] Referring to Fig. 3 On the basis of example 1, the inner ring of the crank pin shaft 20 cooperates with the crank pin shaft 20, and the outer ring of the crank pin shaft 20 cooperates with the bearing seat three 18.
[0083] The bearing self-sealing ring three 21 is fixed on the outer ring of the crank pin shaft bearing 22.
[0084] The bearing self-sealing ring three 21 cooperates with the inner ring of the crank pin shaft bearing 22 to form a seal.
[0085] The outer ring of the crank pin shaft bearing 22 cooperates with the end cover three 16 and the bearing seat three 18 on both sides.
[0086] The end cover three 16 is fixed on the bearing seat three 18, and the bearing seat three 18 and the crank pin shaft 20 are sealed by the rubber sealing ring three 19.
[0087] The positioning assembly of the crank pin shaft bearing 22 comprises a bearing cover plate 17 and a bolt, the bearing cover plate 17 is fixed on one end of the crank pin shaft 20 through the bolt and cooperates with one side of the crank pin shaft bearing 22 to play a positioning role.
[0088] Example 7
[0089] On the basis of example 6, the space between the crank pin shaft bearing 22 and the end cover three 16 is filled with general lithium-based lubricating grease with high consistency, so as to further increase the sealing performance of the bearing.
[0090] The above is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A bearing for an oil pumping unit with high sealing performance, characterized in that: Including bearing inner ring, bearing outer ring, bearing sealing ring, end cover, rubber sealing ring and positioning assembly; The inner ring of the bearing is matched with the shaft, the outer ring of the bearing is matched with the bearing seat, and the sealing ring of the bearing is fixedly arranged on the outer ring of the bearing; The end cover is fixed on the bearing seat, and both sides of the bearing outer ring are respectively matched with the end cover of the bearing seat.
2. The bearing for an oil pumping unit with high sealing performance according to claim 1, characterized in that: The bearings include a central shaft bearing (8), a tail shaft bearing (15), and a crank pin bearing (22); The central shaft bearing (8) is a double-row tapered roller bearing with a self-seal, and the tail shaft bearing (15) is a spherical roller bearing with a self-seal; The shaft comprises a central shaft (5), a tail shaft (12), and a crank pin shaft (20); The bearing self-contained sealing ring includes a bearing self-contained sealing ring 1 (7), a bearing self-contained sealing ring 2 (14), and a bearing self-contained sealing ring 3 (21); The bearing seat end cover includes end cover one (2), end cover two (10), and end cover three (16); The bearing seat comprises a bearing seat 1 (1), a bearing seat 2 (9), and a bearing seat 3 (18); The rubber sealing ring includes a rubber sealing ring 1 (6), a rubber sealing ring 2 (13), and a rubber sealing ring 3 (19).
3. The bearing for an oil pumping unit with high sealing performance according to claim 2, characterized in that: The inner ring of the central shaft bearing (8) is matched with the central shaft (5), and the outer ring of the central shaft bearing (8) is matched with the bearing seat (1); The bearing comes with a sealing ring (7) fixed on the outer ring of the central shaft bearing (8).
4. The bearing for an oil pumping unit with high sealing performance according to claim 3, characterized in that: The central shaft bearing (8) also includes a bearing-attached sealing seat (3); The bearing has a sealing seat (3) fixed on the inner ring of the central shaft bearing (8); The central shaft bearing (8) has a sealing ring (7) provided therein and a sealing seat (3) provided therein to form a seal; The outer ring of the central shaft bearing (8) is matched with the end cover (2) on both sides; The end cover 1 (2) is fixed on the bearing seat 1 (1); the end cover 1 (2) and the central shaft (5) are sealed with a rubber sealing ring 1 (6).
5. The bearing for an oil pumping unit with high sealing performance according to claim 4, characterized in that: The positioning assembly of the central shaft bearing (8) comprises a positioning sleeve (4), which is sleeved on the central shaft (5) and has one side cooperating with a sealing seat (3) provided with the bearing to play a positioning role.
6. The bearing for an oil pumping unit with high sealing performance according to claim 2, characterized in that: The inner ring of the tail shaft bearing (15) is matched with the tail shaft (12), and the outer ring of the tail shaft bearing (15) is matched with the second bearing seat (9); The bearing has a second sealing ring (14) fixed on the outer ring of the tail shaft bearing (15).
7. The bearing for an oil pumping unit with high sealing performance according to claim 6, characterized in that: The bearing has a second sealing ring (14) which cooperates with the inner ring of the tail shaft bearing (15) to form a seal; The outer rings of the tail shaft bearing (15) are respectively matched with the second end cover (10); The second end cover (10) is fixed on the second bearing seat (9); the second end cover (10) and the tail shaft (12) are sealed with a second rubber sealing ring (13).
8. The bearing for an oil pumping unit with high sealing performance according to claim 7, characterized in that: The positioning assembly of the tail shaft bearing (15) includes a positioning nut (11), which is fixed to one side of the tail shaft (12) through a thread and cooperates with the inner ring of the tail shaft bearing (15) to play a positioning role.
9. The bearing for an oil pumping unit with high sealing performance according to claim 2, characterized in that: The inner ring of the crank pin (20) cooperates with the crank pin (20), and the outer ring of the crank pin (20) cooperates with the bearing seat three (18); The bearing has a sealing ring (21) which is fixed on the outer ring of the crank pin bearing (22); The bearing's own sealing ring (21) cooperates with the inner ring of the crankpin bearing (22) to form a seal; The outer ring of the crank pin bearing (22) is matched with the end cover three (16) and the bearing seat three (18) on both sides respectively; End cover three (16) is fixed on bearing seat three (18); a rubber sealing ring three (19) is used to seal between bearing seat three (18) and crank pin (20).
10. The bearing for an oil pumping unit with high sealing performance according to claim 9, characterized in that: The positioning assembly of the crankpin bearing (22) comprises a bearing cover plate (17) and bolts. The bearing cover plate (17) is fixed to one end of the crankpin (20) by means of bolts and cooperates with one side of the crankpin bearing (22) to play a positioning role.