CN109989937B - Shaft end sealing device of submersible pump shaft - Google Patents
Shaft end sealing device of submersible pump shaft Download PDFInfo
- Publication number
- CN109989937B CN109989937B CN201910380779.7A CN201910380779A CN109989937B CN 109989937 B CN109989937 B CN 109989937B CN 201910380779 A CN201910380779 A CN 201910380779A CN 109989937 B CN109989937 B CN 109989937B
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- China
- Prior art keywords
- shaft
- sealing
- shell
- shaft seal
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 119
- 239000004677 Nylon Substances 0.000 claims abstract description 54
- 229920001778 nylon Polymers 0.000 claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 32
- 239000007924 injection Substances 0.000 claims description 32
- 239000003292 glue Substances 0.000 claims description 28
- 239000004519 grease Substances 0.000 claims description 24
- 230000001050 lubricating effect Effects 0.000 claims description 19
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 2
- 238000005461 lubrication Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/061—Lubrication especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a shaft end sealing device of a submersible pump shaft, which comprises a motor shell, wherein a shaft sealing groove is formed in the motor shell, a shaft sealing device is arranged in the shaft sealing groove, the shaft sealing device comprises a shaft sealing shell, a shaft channel is formed between the top and the bottom of the shaft sealing shell, a nylon core is arranged in the shaft channel, a pump shaft penetrates through the nylon core, a special shaft seal is sleeved on the surface of the pump shaft, a plurality of sealing grooves are formed in the outer surface of the shaft sealing shell, O-shaped rings are arranged in the sealing grooves, and water-stopping rubber is sleeved between two adjacent sealing grooves on the outer surface of the shaft sealing shell. According to the invention, friction sealing is carried out between the nylon ring and the nylon core, so that the service life of the shaft seal of the pump shaft is prolonged effectively according to the high wear resistance and sealing property of the nylon material, and the sealing property of the shaft seal device is increased under the action of the O-shaped ring and the water stop rubber.
Description
Technical Field
The invention relates to the technical field of submersible pump equipment, in particular to a shaft end sealing device of a submersible pump shaft.
Background
The submersible motor is often used as a power part of the submersible pump, the submersible motor can be completely immersed into water to work through the structural design, in order to ensure that the submersible motor can safely work under the liquid, the liquid is required to be ensured not to enter the motor in the working process, and therefore the rotating shaft part of the motor is required to be sealed, and the motor can normally run and can not be damaged due to water inflow.
In the prior art, the pump shaft and the motor shell are rotated together in a mechanical seal mode to realize water resistance, but in the use process of the mechanical seal, a large amount of heat is generated by friction between a moving ring and a static ring of the mechanical seal, so that the abrasion loss of the moving ring and the static ring is quickened, and thus, parameters are leaked, on the other hand, when the mechanical seal is installed, leakage is easily generated from the outer surface of the mechanical seal, thereby influencing the water resistance of a sealing structure, and reducing the effective service life of the submersible motor
Therefore, it is necessary to invent a shaft end sealing device for a submersible pump shaft to solve the above problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the shaft end sealing device of the submersible pump shaft, which is characterized in that the nylon ring and the nylon core are adopted for friction sealing, so that the service life of the shaft seal of the submersible pump shaft is effectively prolonged according to the high wear resistance and sealing property of a nylon material, and the sealing property of the shaft seal device is increased through the action of the O-shaped ring and the water stop rubber, so that the problems in the background art are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a shaft end sealing device of immersible pump axle, includes motor housing, the inside shaft seal groove of having seted up of motor housing, shaft seal groove inside is provided with shaft seal device, shaft seal device includes the shaft seal housing, shaft passageway has been seted up between shaft seal housing top and the bottom, the inside nylon core that is provided with of shaft passageway, the inside through-connection of nylon core has the pump shaft, specially-made shaft seal has been cup jointed on the pump shaft surface, a plurality of seal groove has been seted up to shaft seal housing surface, the inside O shape circle that is provided with of seal groove, shaft seal housing surface has cup jointed sealing rubber between two adjacent seal grooves.
Preferably, the special shaft seal comprises a sealing ring and a nylon ring, wherein the sealing ring is sleeved on the surface of the pump shaft, and the nylon ring is sleeved on the surface of the sealing ring.
Preferably, the shaft seal shell is divided into an upper shell cover, a middle seal cover and a lower shell column, a plurality of bolt holes are formed in the periphery of the shaft seal groove of the motor shell, a plurality of screw holes are formed in the periphery of the upper surface of the upper shell cover, and a plurality of fastening bolts are arranged between the motor shell and the shaft seal device through the screw holes and the bolt holes.
Preferably, the height of the middle sealing cover is smaller than the depth of the shaft seal groove, the diameter size of the middle sealing cover is smaller than the diameter size of the shaft seal groove, and a sealing space is formed between the middle sealing cover and the shaft seal groove.
Preferably, the upper shell cover is close to two sides and is positioned at the top of the sealing space, glue injection holes are formed in the sealing space, sealing glue is arranged in the sealing space, and sealing glue of a water pump special for a ship is adopted.
Preferably, the outer diameter of the nylon ring is matched with the inner diameter of the nylon core, and the inner diameter of the sealing ring is matched with the outer diameter of the pump shaft.
Preferably, the number of the special shaft seals is two or more than one, a lubrication space is formed between two adjacent special shaft seals, lubricating grease is arranged in the lubrication space, and grease injection holes are formed in two sides of the shaft seal shell, which are located in the lubrication space.
Preferably, sealing plugs are arranged at the tops of the glue injection holes and the grease injection holes, and the two glue injection holes and the grease injection holes are all arranged in a ventilation mode by adopting one material injection mode.
The invention has the technical effects and advantages that:
1. through adopting between nylon circle and the nylon core to carry out friction seal, the effectual high wear-resisting and the sealing characteristic that has according to nylon material to increase the bearing seal life-span of pump shaft, and through the effect of O shape circle and stagnant water rubber, prevent that the external production of bearing seal casing surface from leaking, thereby increase shaft seal device's sealing characteristic.
2. Through the sealed space, the seal gum is effectively adopted to seal the space between the shaft seal device and the shaft seal groove, thereby enhancing the sealing property of the shaft seal device.
3. Through being equipped with lubricated space, effectually adopt lubricating grease to lubricate between nylon circle and the nylon core, prevent to produce dry friction between nylon circle and the nylon core, cause wearing and tearing too fast to adopt the cooling effect that lubricating grease had, reduce the heat that friction produced between nylon circle and the nylon core, improve the sealed life of device.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the portion A in FIG. 1 according to the present invention;
FIG. 3 is a schematic view of a half-section of a specially-manufactured shaft seal structure of the present invention;
FIG. 4 is a left cross-sectional view of the inventive tailored shaft seal structure;
FIG. 5 is a top view of the motor housing structure of the present invention;
FIG. 6 is a bottom view of the shaft seal apparatus of the present invention;
FIG. 7 is a schematic view of the shaft seal housing of the present invention.
In the figure: 1. a motor housing; 2. a shaft seal groove; 3. a shaft seal device; 4. a shaft seal housing; 5. a shaft passage; 6. a nylon core; 7. a pump shaft; 8. a special shaft seal; 9. sealing grooves; 10. an O-ring; 11. a water-stop rubber; 12. a seal ring; 13. nylon rings; 14. a top cover; 15. a middle sealing cover; 16. a lower shell column; 17. bolt holes; 18. screw holes; 19. a fastening bolt; 20. sealing the space; 21. a glue injection hole; 22. a lubrication space; 23. injecting grease holes; 24. and (5) sealing plugs.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
according to the shaft end sealing device of the submersible pump shaft shown in fig. 1-7, the submersible pump shaft comprises a motor shell 1, a shaft sealing groove 2 is formed in the motor shell 1, a shaft sealing device 3 is arranged in the shaft sealing groove 2, the shaft sealing device 3 comprises a shaft sealing shell 4, a shaft channel 5 is formed between the top and the bottom of the shaft sealing shell 4, a nylon core 6 is arranged in the shaft channel 5, friction sealing is carried out between the nylon ring 13 and the nylon core 6, the high wear resistance and the sealing property of the submersible pump shaft are effectively achieved according to nylon materials, the shaft sealing life of the pump shaft 7 is prolonged, the pump shaft 7 is connected inside the nylon core 6 in a penetrating mode, a special seal 8 is sleeved on the surface of the pump shaft 7, a plurality of seal grooves 9 are formed in the outer surface of the shaft sealing shell 4, O-shaped rings 10 are arranged inside the seal grooves 9, a water sealing rubber 11 is sleeved between the two adjacent seal grooves 9, the outer surface of the shaft sealing shell 4 is prevented from being leaked through the effect of the O-shaped rings 10 and the water sealing rubber 11, and the sealing property of the device 3 is increased.
Furthermore, in the above technical scheme, the special shaft seal 8 comprises a sealing ring 12 and a nylon ring 13, the sealing ring 12 is sleeved on the surface of the pump shaft 7, and the nylon ring 13 is sleeved on the surface of the sealing ring 12, so that the sealing ring 12 and the surface of the pump shaft 7 are sealed, and the sealing mode is adopted, the pump shaft 7 is not required to be directly rubbed with the shaft seal, and the service life of the shaft seal device 3 is prolonged.
Further, in the above technical scheme, the shaft seal housing 4 is divided into an upper housing cover 14, a middle sealing cover 15 and a lower housing column 16, a plurality of bolt holes 17 are formed around the periphery of the shaft seal groove 2 of the motor housing 1, a plurality of screw holes 18 are formed around the periphery of the upper surface of the upper housing cover 14, a plurality of fastening bolts 19 are arranged between the motor housing 1 and the shaft seal device 3 through the screw holes 18 and the bolt holes 17, and the motor housing 1 and the shaft seal device 3 are fixed through the fastening bolts 19.
Further, in the above technical solution, the height of the middle sealing cover 15 is smaller than the depth of the shaft sealing groove 2, the diameter of the middle sealing cover 15 is smaller than the diameter of the shaft sealing groove 2, and a sealing space 20 is formed between the middle sealing cover 15 and the shaft sealing groove 2.
Further, in the above technical scheme, the glue injection holes 21 are formed in the top of the sealing space 20 near two sides of the upper casing cover 14, the sealing glue is arranged in the sealing space 20, the sealing glue is a sealing glue of a water pump special for a ship, and the sealing glue is effectively used for sealing between the shaft seal 3 and the shaft seal groove 2 through the sealing space 20, so that the sealing characteristic of the shaft seal device 3 is enhanced.
Further, in the above technical solution, the outer diameter of the nylon ring 13 is matched with the inner diameter of the nylon core 6, and the inner diameter of the seal ring 12 is matched with the outer diameter of the pump shaft 7.
Furthermore, in the above technical scheme, the number of the special shaft seals 8 is two or more than one, a lubrication space 22 is formed between two adjacent special shaft seals 8, lubricating grease is arranged in the lubrication space 22, grease injection holes 23 are formed in two sides of the shaft seal shell 4, which are positioned in the lubrication space 22, the nylon ring 13 and the nylon core 6 are effectively lubricated by the lubricating grease through the lubrication space 22, dry friction between the nylon ring 13 and the nylon core 6 is prevented, the abrasion is too fast, and the cooling effect of the lubricating grease is adopted, so that the heat generated by friction between the nylon ring 13 and the nylon core 6 is reduced, and the sealing life of the device is prolonged.
Furthermore, in the above technical solution, the top parts of the glue injection hole 21 and the grease injection hole 23 are respectively provided with a sealing plug 24, and the two glue injection holes 21 and the grease injection hole 23 are respectively provided with a material injection and a ventilation arrangement, so that the sealing space 20 and the lubrication space 22 are completely filled with the sealing glue and the lubricating grease.
The working principle of the invention is as follows:
referring to fig. 1-7 of the specification, when the device is installed, an O-shaped ring 10 is installed in a sealing groove 9 of a shaft seal shell 4 of a shaft seal device 3 near the top, then a water stop rubber 11 is installed, the O-shaped ring 10 and the water stop rubber 11 are completely assembled according to the sequence, a special shaft seal 8 is installed at a specific position on the surface of a pump shaft 7, the pump shaft 7 penetrates into a nylon core 6 in a shaft channel 5 from the bottom of the shaft seal shell 4 to enable the position to be completely fixed, the shaft seal shell 4 of the shaft seal device 3 is inserted into a shaft seal groove 2 to enable bolt holes 17 to be aligned with screw holes 18, the shaft seal device 3 and a motor shell 1 are fixed by adopting a fastening bolt 19, so that the shaft seal life of the pump shaft 7 is effectively prolonged according to the high wear resistance and sealing characteristics of nylon materials, and the external leakage of the outer surface of the shaft seal shell 4 is prevented by the effect of the O-shaped ring 10 and the water stop rubber 11, and the sealing characteristics of the shaft seal device 3 are improved;
referring to fig. 2 of the specification, when the shaft seal device 3 and the pump shaft 7 are installed, the sealing plugs 24 on the glue injection holes 21 and the grease injection holes 23 are opened, the glue injection gun and the grease injection gun are used for injecting sealing glue and lubricating grease into the sealing space 20 and the lubricating space 22 respectively through one of the glue injection holes 21 and the grease injection holes 23, in the glue injection and grease injection process, air in the sealing space 20 and the lubricating space 22 is discharged through the other glue injection hole 21 and the grease injection hole 23, so that the sealing glue and lubricating grease are fully filled into the sealing space 20 and the lubricating space 22, the shaft seal 3 and the shaft seal groove 2 are sealed through the sealing glue effectively, the sealing property of the shaft seal device 3 is enhanced, the lubricating space 22 is used for lubricating the nylon ring 13 and the nylon core 6 effectively, dry friction is prevented from being generated between the nylon ring 13 and the nylon core 6, the abrasion is too fast, the cooling effect of the lubricating grease is adopted, the heat generated by friction between the nylon ring 13 and the nylon core 6 is reduced, and the sealing life of the device is prolonged.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (5)
1. Shaft end sealing device of immersible pump axle, including motor casing (1), its characterized in that: the motor comprises a motor shell (1), wherein a shaft seal groove (2) is formed in the motor shell, a shaft seal device (3) is arranged in the shaft seal groove (2), the shaft seal device (3) comprises a shaft seal shell (4), a shaft channel (5) is formed between the top and the bottom of the shaft seal shell (4), a nylon core (6) is arranged in the shaft channel (5), a pump shaft (7) is connected with the nylon core (6) in a penetrating manner, a special shaft seal (8) is sleeved on the surface of the pump shaft (7), a plurality of seal grooves (9) are formed in the outer surface of the shaft seal shell (4), O-shaped rings (10) are arranged in the seal grooves (9), and water stop rubber (11) is sleeved between two adjacent seal grooves (9) on the outer surface of the shaft seal shell (4);
the special shaft seal (8) comprises a sealing ring (12) and a nylon ring (13), the sealing ring (12) is sleeved on the surface of the pump shaft (7), and the nylon ring (13) is sleeved on the surface of the sealing ring (12);
the shaft seal shell (4) is divided into an upper shell cover (14), a middle seal cover (15) and a lower shell column (16), a plurality of bolt holes (17) are formed in the periphery of the shaft seal groove (2) of the motor shell (1), a plurality of screw holes (18) are formed in the periphery of the upper surface of the upper shell cover (14), and a plurality of fastening bolts (19) are arranged between the motor shell (1) and the shaft seal device (3) through the screw holes (18) and the bolt holes (17);
the height of the middle sealing cover (15) is smaller than the depth of the shaft seal groove (2), the diameter size of the middle sealing cover (15) is smaller than the diameter size of the shaft seal groove (2), and a sealing space (20) is formed between the middle sealing cover (15) and the shaft seal groove (2).
2. The shaft end sealing device of a submersible pump shaft according to claim 1, wherein: glue injection holes (21) are formed in the tops of the sealing spaces (20) close to two sides of the upper shell cover (14), sealing glue is arranged in the sealing spaces (20), and sealing glue is water pump sealing glue special for ships.
3. The shaft end sealing device of a submersible pump shaft according to claim 1, wherein: the outer diameter of the nylon ring (13) is matched with the inner diameter of the nylon core (6), and the inner diameter of the sealing ring (12) is matched with the outer diameter of the pump shaft (7).
4. The shaft end sealing device of a submersible pump shaft according to claim 1, wherein: the number of the special shaft seals (8) is two or more than two, a lubricating space (22) is formed between two adjacent special shaft seals (8), lubricating grease is arranged in the lubricating space (22), and grease injection holes (23) are formed in the two sides of the lubricating space (22) where the shaft seal shell (4) is located.
5. A shaft end sealing arrangement for a submersible pump shaft according to claim 2, wherein: the top of the glue injection hole (21) and the top of the fat injection hole (23) are respectively provided with a sealing plug (24), and the two glue injection holes (21) and the fat injection hole (23) are respectively provided with a ventilation arrangement by adopting one material injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910380779.7A CN109989937B (en) | 2019-05-08 | 2019-05-08 | Shaft end sealing device of submersible pump shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910380779.7A CN109989937B (en) | 2019-05-08 | 2019-05-08 | Shaft end sealing device of submersible pump shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109989937A CN109989937A (en) | 2019-07-09 |
| CN109989937B true CN109989937B (en) | 2024-01-23 |
Family
ID=67136221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910380779.7A Active CN109989937B (en) | 2019-05-08 | 2019-05-08 | Shaft end sealing device of submersible pump shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109989937B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048062B (en) * | 2021-04-15 | 2022-09-13 | 追觅创新科技(苏州)有限公司 | Centrifugal pump and dish washing machine |
| CN113586461B (en) * | 2021-08-23 | 2023-08-18 | 安徽智泓净化科技股份有限公司 | Self-priming pump with sealing mechanism |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3047299A (en) * | 1958-12-08 | 1962-07-31 | Asea Ab | Gland seals for gas-filled electric machines |
| US3499654A (en) * | 1966-01-17 | 1970-03-10 | Reliance Electric Co | Bearing-shaft sealing structure |
| US4632406A (en) * | 1981-01-15 | 1986-12-30 | Avaa International Corp. | Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member |
| CN102734465A (en) * | 2011-03-31 | 2012-10-17 | 株式会社久保田 | Sealing device for input operation rod shaft of engine |
| CN203239932U (en) * | 2013-02-21 | 2013-10-16 | 北京建科汇峰科技有限公司 | Large shield tunneling machine lip-shaped seal ring |
| CN207201345U (en) * | 2017-08-14 | 2018-04-10 | 宋加龙 | The pumping water device of intelligent lotus root digging harvester |
| CN210068543U (en) * | 2019-05-08 | 2020-02-14 | 合肥恒大江海泵业股份有限公司 | Shaft end sealing device of submersible pump shaft |
-
2019
- 2019-05-08 CN CN201910380779.7A patent/CN109989937B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3047299A (en) * | 1958-12-08 | 1962-07-31 | Asea Ab | Gland seals for gas-filled electric machines |
| US3499654A (en) * | 1966-01-17 | 1970-03-10 | Reliance Electric Co | Bearing-shaft sealing structure |
| US4632406A (en) * | 1981-01-15 | 1986-12-30 | Avaa International Corp. | Apparatus in which an annular ring is carried within a groove about one member for slidably engaging the cylindrical surface of another member |
| CN102734465A (en) * | 2011-03-31 | 2012-10-17 | 株式会社久保田 | Sealing device for input operation rod shaft of engine |
| CN203239932U (en) * | 2013-02-21 | 2013-10-16 | 北京建科汇峰科技有限公司 | Large shield tunneling machine lip-shaped seal ring |
| CN207201345U (en) * | 2017-08-14 | 2018-04-10 | 宋加龙 | The pumping water device of intelligent lotus root digging harvester |
| CN210068543U (en) * | 2019-05-08 | 2020-02-14 | 合肥恒大江海泵业股份有限公司 | Shaft end sealing device of submersible pump shaft |
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| Publication number | Publication date |
|---|---|
| CN109989937A (en) | 2019-07-09 |
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