CN220268379U - Shaft end sealing leakage-proof structure of pumping unit speed reducer - Google Patents
Shaft end sealing leakage-proof structure of pumping unit speed reducer Download PDFInfo
- Publication number
- CN220268379U CN220268379U CN202322093531.7U CN202322093531U CN220268379U CN 220268379 U CN220268379 U CN 220268379U CN 202322093531 U CN202322093531 U CN 202322093531U CN 220268379 U CN220268379 U CN 220268379U
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- sealing
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- side wall
- main shaft
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- 238000007789 sealing Methods 0.000 title claims abstract description 99
- 238000005086 pumping Methods 0.000 title claims abstract description 35
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 33
- 210000004907 gland Anatomy 0.000 claims abstract description 53
- 230000009467 reduction Effects 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 6
- 230000003746 surface roughness Effects 0.000 claims description 5
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 22
- 239000010687 lubricating oil Substances 0.000 description 9
- 238000005299 abrasion Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing Of Bearings (AREA)
Abstract
The utility model provides a shaft end sealing leakage-proof structure of a pumping unit reducer, which comprises a framework sealing structure and an inner sealing ring, wherein the framework sealing structure is arranged between the outer side of a bearing gland and the connecting part of a main shaft; the inner sealing ring is sleeved on the main shaft and positioned in the cavity structure, the first side wall of the inner sealing ring is mutually abutted with the inner ring side wall of the ball bearing, and the second side wall of the inner sealing ring is mutually abutted with the inner side wall of the bearing gland. According to the oil pumping machine speed reducer shaft end sealing leakage-proof structure, the original sealing structure of the speed reducer shaft end is not changed, and a second sealing structure is added in a cavity structure between the ball bearing and the bearing gland and is matched with the bearing gland, so that a better sealing effect is achieved. The problem that oil leakage phenomenon can not be completely solved by the sealing structure at the two ends of the main shaft of the oil pumping machine speed reducer in the prior art is solved.
Description
Technical Field
The utility model relates to the technical field of sealing leakage prevention, in particular to a shaft end sealing leakage prevention structure of a pumping unit speed reducer.
Background
The pumping unit is mechanical oil extraction equipment used in oil field enterprises in a large quantity, and reasonable lubrication of the reduction gearbox gear of the pumping unit plays a very important role in maintaining normal operation of the equipment and prolonging the service life of the equipment. Because the oil pumping unit does not belong to precise instruments and equipment, the manufacturing process of the reduction gearbox is relatively rough, and the equipment works in a field environment for a long time, the equipment is not used and maintained in place in daily life, the use condition is bad, and the like, and oil leakage of the equipment is easy to occur. The oil leakage of the equipment not only pollutes the surrounding environment, but also easily causes dry friction of the gear pair after the equipment lacks oil, thereby accelerating the abrasion of the gear tooth surface. After the clearance of each joint surface is increased due to equipment abrasion, abnormal sound is generated by the reduction gearbox, the service life of the equipment is prolonged, and the consumption of lubricating oil products is increased. The problem of oil leakage at the shaft ends of the speed reducer is long-felt, wherein the most serious leakage is at the two ends of the main shaft of the speed reducer. Although reduction gearbox manufacturers are continually improving bearing sealing systems, existing sealing techniques and sealing structures have not been found to be capable of completely solving the problem of oil leakage from field use.
Disclosure of Invention
The utility model mainly aims to provide a shaft end sealing leakage-proof structure of a pumping unit speed reducer, which at least solves the problem that the sealing structure at the two ends of a main shaft of the pumping unit speed reducer in the prior art cannot completely solve the oil leakage phenomenon.
In order to achieve the above purpose, the utility model provides a sealing and leakage-preventing structure of a pumping unit reducer shaft end, which is applied to the pumping unit reducer shaft end, wherein the pumping unit reducer shaft end comprises a main shaft, a ball bearing, a box body and a bearing gland, the inner ring of the ball bearing is sleeved at a step structure of the main shaft, the box body is sleeved on the outer ring of the ball bearing, the bearing gland is arranged on the outer side of the ball bearing by an outer side end cover of the main shaft, the outer ring end of the bearing gland is clamped with the box body and the outer ring of the ball bearing, the inner ring end of the bearing gland is sleeved on the main shaft, and a cavity structure is formed between the inner side wall of the bearing gland and the ball bearing; the sealed leak protection structure includes: the framework sealing structure is arranged between the outer side of the bearing gland and the connecting part of the main shaft; the inner side sealing ring is sleeved on the main shaft and positioned in the cavity structure, the first side wall of the inner side sealing ring is mutually abutted with the inner ring side wall of the ball bearing, and the second side wall of the inner side sealing ring is mutually abutted with the inner side wall of the bearing gland.
Further, the inside seal ring includes: the base ring part is in mutual contact with the inner ring side wall of the ball bearing; the inner ring edge of the sealing lip is connected with the inner ring edge of the base ring part and extends obliquely at a certain angle to form a V-shaped groove between the base ring part and the sealing lip; wherein, the sealing lip can be along axial flexible in order to adapt to the interval between bearing gland and the ball bearing.
Further, the inner diameter of the inner seal ring is smaller than the diameter of the spindle.
Further, the inner sealing ring is made of nitrile rubber or neoprene rubber.
Further, the inner side wall of the bearing gland is a smooth surface, and the surface roughness of the inner side wall of the bearing gland is less than 0.4.
The oil pumping machine speed reducer shaft end sealing leakage-proof structure is applied to the oil pumping machine speed reducer shaft end, the oil pumping machine speed reducer shaft end comprises a main shaft, a ball bearing, a box body and a bearing gland, an inner ring of the ball bearing is sleeved at a step structure of the main shaft, the box body is sleeved on an outer ring of the ball bearing, the bearing gland is arranged on the outer side of the ball bearing by an outer side end cover of the main shaft, an outer ring end of the bearing gland is clamped with the box body and the outer ring of the ball bearing, an inner ring end of the bearing gland is sleeved on the main shaft, and a cavity structure is formed between the inner side wall of the bearing gland and the ball bearing; the sealing leakage-proof structure comprises a framework sealing structure and an inner sealing ring, and the framework sealing structure is arranged between the outer side of the bearing gland and the connecting part of the main shaft; the inner sealing ring is sleeved on the main shaft and positioned in the cavity structure, the first side wall of the inner sealing ring is mutually abutted with the inner ring side wall of the ball bearing, and the second side wall of the inner sealing ring is mutually abutted with the inner side wall of the bearing gland. According to the oil pumping machine speed reducer shaft end sealing leakage-proof structure, the original sealing structure of the speed reducer shaft end is not changed, and a second sealing structure is added in a cavity structure between the ball bearing and the bearing gland and is matched with the bearing gland, so that a better sealing effect is achieved. The problem that oil leakage phenomenon can not be completely solved by the sealing structure at the two ends of the main shaft of the oil pumping machine speed reducer in the prior art is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic view of an alternative mounting structure for a pumping unit reducer shaft end seal leak-proof structure according to an embodiment of the utility model;
fig. 2 is a schematic structural view of an inner seal ring of an alternative shaft end sealing leakage-proof structure of a pumping unit reducer according to an embodiment of the present utility model.
Wherein the above figures include the following reference numerals:
10. a main shaft; 20. a ball bearing; 21. an inner ring; 22. an outer ring; 30. a case; 40. a bearing gland; 50. a cavity structure; 60. a skeletal sealing structure; 70. an inner seal ring; 71. a base ring portion; 72. and a sealing lip.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment of the utility model provides a sealing and leakage-preventing structure of a pumping unit speed reducer shaft end, which is applied to the pumping unit speed reducer shaft end as shown in fig. 1, wherein the pumping unit speed reducer shaft end comprises a main shaft 10, a ball bearing 20, a box body 30 and a bearing gland 40, an inner ring 21 of the ball bearing 20 is sleeved at a step structure of the main shaft 10, the box body 30 is sleeved on an outer ring 22 of the ball bearing 20, the bearing gland 40 is arranged at the outer side of the ball bearing 20 by an outer end cover of the main shaft 10, the outer ring end of the bearing gland 40 is mutually clamped with the box body 30 and the outer ring 22 of the ball bearing 20, an inner ring end of the bearing gland 40 is sleeved on the main shaft 10, and a cavity structure 50 is formed between the inner side wall of the bearing gland 40 and the ball bearing 20; the sealing leakage-proof structure comprises a framework sealing structure 60 and an inner sealing ring 70, wherein the framework sealing structure 60 is arranged between the outer side of the bearing gland 40 and the connecting part of the main shaft 10; the inner seal ring 70 is sleeved on the main shaft 10 and is located in the cavity structure 50, a first side wall of the inner seal ring 70 is in contact with an inner ring side wall of the ball bearing 20, and a second side wall of the inner seal ring 70 is in contact with an inner side wall of the bearing cover 40. According to the oil pumping machine speed reducer shaft end sealing leakage-proof structure, the original sealing structure of the speed reducer shaft end is not changed, and a second sealing structure is added in a cavity structure between the ball bearing and the bearing gland and is matched with the bearing gland, so that a better sealing effect is achieved. The problem that oil leakage phenomenon can not be completely solved by the sealing structure at the two ends of the main shaft of the oil pumping machine speed reducer in the prior art is solved.
In particular, as shown in fig. 2, the inner seal ring 70 includes a base ring portion 71 and a seal lip 72, and the base ring portion 71 abuts against a side wall of the inner ring 21 of the ball bearing 20; the inner circumferential edge of the seal lip 72 is connected to the inner circumferential edge of the base ring portion 71 and extends obliquely at an angle to form a "V" shaped groove between the base ring portion 71 and the seal lip 72; when the lubricating oil splashes at a high speed, a small part of the lubricating oil permeates into the cavity structure 50 between the ball bearing 20 and the bearing gland 40, and the inner sealing ring 70 is tightly combined with the main shaft 10 and the bearing gland 40, so that the oil is prevented from entering a gap between the bearing gland 40 and the main shaft 10, and meanwhile, the V-shaped groove of the inner sealing ring 70 rotating along with the main shaft 10 is like a screw conveyor, so that the lubricating oil at the lower part of the cavity structure 50 can be constantly thrown to the upper part through centrifugal force, and then returns to the oil tank through the gap of the ball bearing 20.
The sealing lip 72 can flex in an axial direction to accommodate the spacing between the bearing gland 40 and the ball bearing 20 to achieve a better seal against the inside wall of the bearing gland 40. Alternatively, the base ring portion 71 has a rectangular longitudinal section, and the seal lip 72 has an annular sheet-like structure and has a certain elasticity so as to accommodate the space between the bearing cover 40 and the ball bearing 20. Under the action of the bearing cover 40, an initial compression amount is caused to the sealing lip 72, so that the sealing lip is fully contacted with the sealing surface of the bearing cover 40, and the sealing effect can be ensured. Over time, the contact portion of the sealing lip 72 wears, the sealing lip 72 is always compensated under the action of the bearing cover 40, the compression amount of the sealing lip 72 can be adjusted, and the end face contact of the sealing lip 72 and the bearing cover 40 is always ensured until the sealing lip 72 is integrally damaged. Therefore, when the inner seal ring 70 is installed, the axial positioning dimension is critical, and if the axial positioning dimension is not right, the sealing and the bearing gland 40 cannot be tightly attached, and the radial sealing effect will be affected.
Further, the inner diameter of the inner seal ring 70 is smaller than the diameter of the main shaft 10; can tightly hug the journal of the main shaft 10 and rotate together with the main shaft 10. The inner seal ring 70 is made of nitrile rubber or neoprene rubber. The inner side wall of the bearing gland 40 is a smooth surface, and the surface roughness of the inner side wall of the bearing gland 40 is less than 0.4. The end face of the sealing lip 72 is closely fitted to the bearing cover 40 so as to achieve the sealing purpose, and thus friction exists between the sealing lip 72 and the bearing cover 40. In order to ensure the service life of the inner seal ring 70, when the bearing gland 40 is processed, the processing precision and the surface roughness of the contact surface are improved, and generally, chromium plating polishing treatment is adopted, so that the service life of the inner seal ring 70 can be effectively ensured when the surface roughness is below 0.4.
The material of the inner seal ring 70 may be a rubber product such as nitrile rubber or neoprene rubber. Natural rubber is used for sealing against water and air, butyl rubber is used for nonflammable hydraulic oil and phosphate-based hydraulic oil, and chlororubber is used for various chemicals and high temperature. When abrasion resistance is required, urethane rubber is used. The textile rubber is also an optional material for the inner seal ring 70, and is characterized by increasing the rigidity and strength of the seal ring, preventing the phenomena of extrusion of sizing material and gap bite, and enabling the textile rubber to be suitable for high pressure. Meanwhile, in the abrasion process, the rubber is abraded before the fabric and expands to a part with high contact pressure, so that the abrasion of the whole sealing surface tends to be uniform, and the friction is not changed obviously. However, the lip of the fabric-sandwiched rubber seal is prone to scrape off the oil film on the sliding surface, and thus has poor lubricity.
When the sealing leakage-proof structure of the embodiment of the utility model is installed, lubricating oil is firstly smeared on the end face of the sealing lip 72 and the inner side wall of the bearing gland 40 so as to prevent the lubricating oil from reaching the contact surface of the sealing lip 72 and the bearing gland 40 in time to generate dry friction when equipment starts to operate, thereby generating instant high temperature and damaging the inner side sealing ring 70. After the lubricating oil is applied, the friction coefficient can be reduced, thereby prolonging the service life of the inner seal ring 70. In order to ensure the correct installation size, during installation, firstly, the inner ring of the inner sealing ring 70 is coated with lubricating oil to ensure that the inner sealing ring 70 can slide along the spindle 10 in the axial direction, then a 0.5-1 mm thin gasket is additionally arranged on the bearing gland 40, the bearing gland 40 is used for pushing the inner sealing ring 70 inwards through the thin gasket until the outer side of the bearing gland 40 is in contact with the side wall of the box body 30, then the thin gasket is removed, and the pressing screw is fastened to fix the bearing gland 40. If a gasket is provided on the bearing cap 40, the above operation is performed after the gasket is installed.
The technology has the beneficial effects that:
the oil leakage problem at the shaft end of the reduction gearbox of the pumping unit can be effectively solved by adding the inner sealing ring 70 into the cavity structure 50 at the bearing end of the reduction gearbox of the pumping unit and correctly smearing lubricating oil according to requirements, improving the processing precision of the bearing gland 40 and other technical measures; the inner sealing ring 70 is only provided with a sealing structure on the input and output shafts of the original speed reducer, the original sealing form, number and size are not changed, the structure is simple, and the sealing effect is good.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. The utility model provides a pumping unit reduction gear axle head seal leak protection structure, seal leak protection structure is applied to pumping unit reduction gear axle head, pumping unit reduction gear axle head includes main shaft (10), ball bearing (20), box (30) and bearing cap (40), the inner circle (21) of ball bearing (20) are overlapped and are established the step structure department of main shaft (10), box (30) are overlapped and are established on outer lane (22) of ball bearing (20), bearing cap (40) are established by the outside end cover of main shaft (10) in the outside of ball bearing (20), the outer loop end of bearing cap (40) with the outer lane (22) of box (30) and ball bearing (20) each other joint, the inner ring end cover of bearing cap (40) is established on main shaft (10), form cavity structure (50) between the inside wall of bearing cap (40) and ball bearing (20); the sealing leakage-proof structure is characterized by comprising:
the framework sealing structure (60) is arranged between the outer side of the bearing gland (40) and the connecting part of the main shaft (10);
the inner sealing ring (70) is sleeved on the main shaft (10) and located in the cavity structure (50), a first side wall of the inner sealing ring (70) is in mutual abutting joint with an inner ring side wall of the ball bearing (20), and a second side wall of the inner sealing ring (70) is in mutual abutting joint with an inner side wall of the bearing gland (40).
2. The pumping unit reducer shaft end sealing leakage prevention structure according to claim 1, wherein the inner seal ring (70) comprises:
a base ring portion (71), wherein the base ring portion (71) and the inner ring (21) side wall of the ball bearing (20) are in contact with each other;
a seal lip (72), wherein the inner annular edge of the seal lip (72) is connected with the inner annular edge of the base ring part (71) and extends obliquely at a certain angle so as to form a V-shaped groove between the base ring part (71) and the seal lip (72);
wherein the sealing lip (72) is axially retractable to accommodate the spacing between the bearing gland (40) and the ball bearing (20).
3. The pumping unit reducer shaft end sealing leakage prevention structure according to claim 1, wherein the inner diameter of the inner sealing ring (70) is smaller than the diameter of the main shaft (10).
4. The oil pumping unit reducer shaft end sealing leakage prevention structure according to claim 1, wherein the inner sealing ring (70) is made of nitrile rubber or neoprene rubber.
5. The oil pumping unit reducer shaft end sealing leakage prevention structure according to claim 1, wherein the inner side wall of the bearing gland (40) is a smooth surface, and the surface roughness of the inner side wall of the bearing gland (40) is less than 0.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322093531.7U CN220268379U (en) | 2023-08-05 | 2023-08-05 | Shaft end sealing leakage-proof structure of pumping unit speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322093531.7U CN220268379U (en) | 2023-08-05 | 2023-08-05 | Shaft end sealing leakage-proof structure of pumping unit speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220268379U true CN220268379U (en) | 2023-12-29 |
Family
ID=89319742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322093531.7U Active CN220268379U (en) | 2023-08-05 | 2023-08-05 | Shaft end sealing leakage-proof structure of pumping unit speed reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220268379U (en) |
-
2023
- 2023-08-05 CN CN202322093531.7U patent/CN220268379U/en active Active
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