CN113513498A - Water pump impeller with seal structure - Google Patents
Water pump impeller with seal structure Download PDFInfo
- Publication number
- CN113513498A CN113513498A CN202110804515.7A CN202110804515A CN113513498A CN 113513498 A CN113513498 A CN 113513498A CN 202110804515 A CN202110804515 A CN 202110804515A CN 113513498 A CN113513498 A CN 113513498A
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- Prior art keywords
- impeller
- sealing
- groove
- ring
- hub
- Prior art date
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 125
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 6
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 abstract description 2
- 238000000429 assembly Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
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- 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
- F04D29/18—Rotors
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- 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
- F04D29/086—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
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- 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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a water pump impeller with a sealing structure, which comprises an impeller, an impeller sealing ring, an anti-falling limiting assembly, a rotating shaft, an impeller nut, a first elastic sealing element, a shaft sleeve and a second elastic sealing element, wherein the impeller sealing ring is sleeved outside the two sides of the impeller respectively, a plurality of anti-falling limiting assemblies are arranged on the two sides of the impeller respectively in the circumferential direction, an anti-falling ring groove is formed in the inner ring of the impeller sealing ring, the end part of the anti-falling limiting assembly penetrates through the impeller and is inserted into the anti-falling ring groove, the impeller is arranged on the rotating shaft through a central hub, one end of the rotating shaft penetrates through the hub and is provided with the impeller nut, the impeller nut is provided with the first elastic sealing element tightly matched with the hub, the outer part of one end of the rotating shaft, which is back to the impeller nut, is sleeved with the shaft sleeve, and the end part of the shaft sleeve is provided with the second elastic sealing element tightly matched with the hub, the water pump impeller sealing structure can not only effectively prevent the impeller sealing ring from falling off, but also effectively avoid looseness during high-speed rotation.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of pump bodies, in particular to a water pump impeller with a sealing structure.
[ background of the invention ]
The existing water pump is designed in a traditional way, the positioning mode of the impeller sealing ring is a mode of fastening by a seam-riding screw, a hole needs to be formed in a gap matched with the impeller and the impeller sealing ring, and after the impeller sealing ring is fastened by the seam-riding screw, the seam-riding screw is easy to fall off due to the action of pressure difference and centrifugal force on two sides of the impeller sealing ring in the operation of the pump, so that the impeller sealing ring is separated from the water pump and the water pump is damaged.
In addition, in the traditional design, the cushion pieces are uniformly arranged between the impeller hub and the impeller nut and between the impeller hub and the shaft sleeve for sealing, and the sealing cushion is easy to deform and the like under various water flow environments, so that the impeller is loosened, the impeller is loosened at high speed and can cause great harm to equipment, and finally, the pump equipment is damaged due to the breakage of the rotating shaft.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides a water pump impeller with a sealing structure, which not only can effectively prevent an impeller sealing ring from falling off, but also can effectively avoid looseness during high-speed rotation.
In order to achieve the purpose, the invention provides a water pump impeller with a sealing structure, which comprises an impeller, an impeller sealing ring, an anti-falling limiting assembly, a rotating shaft, an impeller nut, a first elastic sealing element, a shaft sleeve and a second elastic sealing element, the outer parts of the two sides of the impeller are respectively sleeved with an impeller sealing ring, the two sides of the impeller are respectively provided with a plurality of anti-falling limiting components in the circumferential direction, the inner ring of the impeller sealing ring is provided with an anti-drop ring groove, the end part of the anti-drop limiting component penetrates through the impeller and is inserted into the anti-drop ring groove, the impeller is arranged on the rotating shaft through a hub at the center, one end of the rotating shaft penetrates through the hub and is provided with an impeller nut, install the first elastic sealing element who closely cooperates with wheel hub on the impeller nut, the outside cover of one end of pivot back to the impeller nut is equipped with the axle sleeve, the second elastic sealing element who closely cooperates with wheel hub is installed to the tip of axle sleeve.
Preferably, first annular seal grooves are symmetrically formed in two sides of the anti-falling ring groove, first seal rings are installed in the first annular seal grooves, the inner walls of the first seal rings are tightly matched with the impeller, and the cross sections of the first seal rings are provided with hollow inner cavities.
Preferably, the anti-disengaging limiting assembly comprises a limiting bolt, an insert rod, a blocking cover and an anti-disengaging clamping block, a plug is arranged at one end of the limiting bolt, the plug is matched with the anti-disengaging ring groove, a hexagonal bolt head is arranged at the other end of the limiting bolt, a central installation cavity for inserting the insert rod is formed in the limiting bolt, a through groove is symmetrically formed in the side wall of the central installation cavity, the elastic anti-disengaging clamping block is installed in the through groove, a plurality of threaded holes for installing the anti-disengaging limiting assembly are circumferentially formed in the impeller, the elastic anti-disengaging clamping block abuts against the threaded holes under the action of the insert rod, a threaded connecting sleeve is arranged at the end part color of the hexagonal bolt head, the blocking cover is installed on the threaded connecting sleeve, and the inner wall of the blocking cover abuts against the insert rod to prevent the insert rod from disengaging from the central installation cavity.
Preferably, a second annular sealing groove and a third annular sealing groove are formed in one end, facing the hub, of the impeller nut, a first elastic sealing element is installed in the second annular sealing groove, and a first O-shaped sealing ring is installed in the third annular sealing groove.
Preferably, a third annular sealing groove and a fourth annular sealing groove are formed in one end, facing the hub, of the shaft sleeve, a second elastic sealing element is installed in the third annular sealing groove, and a second O-shaped sealing ring is installed in the fourth annular sealing groove.
Preferably, the first elastic sealing element comprises a pressing plate, a sealing body and springs, the pressing plate is of an annular structure, one side of the pressing plate is installed in the second annular sealing groove of the impeller nut through the springs, the sealing body is installed on the other side of the pressing plate, the inner ring and the outer ring of the sealing body are respectively in close fit with the inner ring and the outer ring of the second annular sealing groove, one end, facing the hub, of the sealing body is in close fit with the hub, and the second elastic sealing element is identical to the first elastic sealing element in structure.
Preferably, one end of the sealing body facing the hub is provided with a plurality of protruding sealing rings, and the protruding sealing rings are tightly matched with the hub.
The invention has the beneficial effects that: according to the invention, through the matching of the impeller, the impeller sealing ring, the anti-falling limiting assembly, the rotating shaft, the impeller nut, the first elastic sealing element, the shaft sleeve, the second elastic sealing element and the like, the anti-falling limiting assembly can strengthen and fix the impeller sealing ring, and effectively prevent the impeller sealing ring from falling off from the impeller. The first elastic sealing element and the second elastic sealing element are respectively additionally arranged on the impeller nut and the shaft sleeve, so that the connection tightness can be ensured, and the impeller can be prevented from loosening during high-speed rotation.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic cross-sectional structural view of a water pump impeller having a seal structure according to the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is an enlarged schematic view of FIG. 1 at B;
FIG. 4 is an enlarged schematic view of FIG. 1 at C;
fig. 5 is a schematic cross-sectional view of a first elastomeric seal of a water pump impeller having a seal configuration in accordance with the present invention.
[ detailed description ] embodiments
Referring to fig. 1 to 5, the water pump impeller with a sealing structure of the present invention includes an impeller 1, an impeller sealing ring 2, an anti-drop limiting assembly 3, a rotating shaft 4, an impeller nut 5, a first elastic sealing element 6, a shaft sleeve 7 and a second elastic sealing element 8, the impeller sealing ring 2 is respectively sleeved outside both sides of the impeller 1, a plurality of anti-drop limiting assemblies 3 are respectively circumferentially installed on both sides of the impeller 1, an anti-drop ring groove 22 is formed on an inner ring of the impeller sealing ring 2, an end of the anti-drop limiting assembly 3 penetrates through the impeller 1 and is inserted into the anti-drop ring groove 22, the impeller 1 is installed on the rotating shaft 4 through a central hub 11, one end of the rotating shaft 4 penetrates through the hub 11 and is installed with the impeller nut 5, the first elastic sealing element 6 tightly fitted with the hub 11 is installed on the impeller nut 5, the shaft 4 is externally sleeved with the shaft sleeve 7 facing away from one end of the impeller nut 5, the end of the shaft sleeve 7 is provided with a second elastic sealing element 8 which is tightly matched with the hub 11.
Further, first annular seal groove 21 has been seted up to anticreep annular 22's bilateral symmetry, install first sealing washer 23 in the first annular seal groove 21, the inner wall of first sealing washer 23 closely cooperates with impeller 1 mutually, the cross-section of first sealing washer 23 has cavity inner chamber 230, can strengthen sealed effect.
Further, the anti-dropping limiting component 3 comprises a limiting bolt 31, an inserting rod 32, a blocking cover 33 and an anti-loosing clamping block 34, one end of the limit bolt 31 is provided with a plug 311, the plug 311 is matched with the anti-drop ring groove 22, the other end of the limit bolt 31 is provided with a hexagonal bolt head 312, the interior of the limit bolt 31 is provided with a central mounting cavity 310 for the insertion rod 32 to insert, through grooves 3101 are symmetrically arranged on the side wall of the central mounting cavity 310, elastic anti-loosening clamping blocks 34 are mounted in the through grooves 3101, a plurality of threaded holes 10 for installing the anti-falling limiting component 3 are circumferentially arranged on the impeller 1, the elastic anti-loose fixture block 34 is abutted against the threaded hole 10 under the action of the inserted rod 32, the end part of the hexagonal bolt head 312 is colored with a threaded connecting sleeve 313, the blocking cover 33 is installed on the threaded connection sleeve 313, and the inner wall of the blocking cover 33 abuts against the insert rod 32 to prevent the insert rod 32 from being removed from the central installation cavity 310. Locking fixture block 34 can closely cooperate with screw hole 10, strengthens spacing bolt 31's locking effect, avoids spacing bolt 31 to deviate from the screw hole because of the vibration.
Further, a second annular seal groove 51 and a third annular seal groove 52 are formed in one end, facing the hub 11, of the impeller nut 5, a first elastic sealing element 6 is installed in the second annular seal groove 51, and a first O-shaped sealing ring 53 is installed in the third annular seal groove 52.
Further, a third annular seal groove 71 and a fourth annular seal groove 72 are formed in one end, facing the hub 11, of the shaft sleeve 7, a second elastic seal element 8 is installed in the third annular seal groove 71, and a second O-shaped seal ring 73 is installed in the fourth annular seal groove 72.
Further, first elastic sealing element 6 includes clamp plate 61, sealing body 62 and spring 63, clamp plate 61 is the annular structure, and one side is installed in impeller nut 5's second annular seal groove 51 through a plurality of spring 63, and sealing body 62 is installed to the opposite side, the inner circle of sealing body 62, outer lane closely cooperate with the inner circle of second annular seal groove 51, outer lane mutually closely cooperate with wheel hub 11 respectively, second elastic sealing element 8 is the same with first elastic sealing element 6's structure towards wheel hub 11's one end. The spring ensures that the sealing body 62 remains in abutment with the hub 11, thereby ensuring the reliability of the connection.
Further, the one end of sealing body 62 towards wheel hub 11 is equipped with the protruding sealing ring 621 of a plurality of, protruding sealing ring 621 closely cooperates with wheel hub 11 mutually, and protruding sealing ring 621 can form multichannel seal structure, strengthens sealed reliability.
The working process of the invention is as follows:
according to the water pump impeller with the sealing structure, the impeller sealing ring 2 can be effectively limited through the matching of the limiting bolt 31 and the anti-loosening ring groove 22, the impeller is prevented from falling off when the impeller rotates, the anti-loosening clamping block 34 is additionally arranged on the limiting bolt 31, the anti-loosening clamping block 34 is partially extruded when the inserting rod 32 is inserted and is matched with the threaded hole 10, the problem that the limiting bolt 31 is loosened due to vibration is effectively solved, the connection reliability is guaranteed, and the impeller sealing ring 2 and the impeller 1 are connected more firmly. And the sealing performance between the impeller sealing ring 2 and the impeller 1 is improved by additionally arranging two first sealing rings 23 on the impeller sealing ring. The two ends of the hub 11 are in sealing fit with the impeller nut 5 and the shaft sleeve 7 through the elastic sealing elements and the O-shaped sealing rings, the connection tightness is guaranteed, the sealing elements are not prone to deformation, and the impeller is prevented from loosening during high-speed rotation.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (7)
1. A water pump impeller with a sealing structure is characterized in that: comprises an impeller (1), an impeller sealing ring (2), anti-dropping limit components (3), a rotating shaft (4), an impeller nut (5), a first elastic sealing element (6), a shaft sleeve (7) and a second elastic sealing element (8), wherein the impeller sealing ring (2) is respectively sleeved outside the two sides of the impeller (1), a plurality of anti-dropping limit components (3) are respectively and circumferentially installed on the two sides of the impeller (1), an anti-dropping ring groove (22) is formed in the inner ring of the impeller sealing ring (2), the end part of each anti-dropping limit component (3) penetrates through the impeller (1) and is inserted into the corresponding anti-dropping ring groove (22), the impeller (1) is installed on the rotating shaft (4) through a hub (11) at the center, one end of the rotating shaft (4) penetrates through the hub (11) and is provided with the impeller nut (5), the impeller nut (5) is provided with the first elastic sealing element (6) which is closely matched with the hub (11), the impeller is characterized in that a shaft sleeve (7) is sleeved outside one end of the rotating shaft (4) back to the impeller nut (5), and a second elastic sealing element (8) tightly matched with the hub (11) is installed at the end part of the shaft sleeve (7).
2. A water pump impeller with a sealing structure according to claim 1, wherein: first annular seal groove (21) have been seted up to the bilateral symmetry of anticreep annular groove (22), install first sealing washer (23) in first annular seal groove (21), the inner wall and impeller (1) of first sealing washer (23) closely cooperate mutually, the cross-section of first sealing washer (23) has cavity inner chamber (230).
3. A water pump impeller with a sealing structure according to claim 1, wherein: the anti-falling limiting assembly (3) comprises a limiting bolt (31), an insert rod (32), a blocking cover (33) and a locking fixture block (34), one end of the limiting bolt (31) is provided with a plug (311), the plug (311) is matched with an anti-falling ring groove (22), the other end of the limiting bolt (31) is provided with a hexagon bolt head (312), a central installation cavity (310) into which the insert rod (32) can be inserted is arranged inside the limiting bolt (31), the side wall of the central installation cavity (310) is symmetrically provided with a through groove (3101), an elastic locking fixture block (34) is arranged in the through groove (3101), a plurality of threaded holes (10) used for installing the anti-falling limiting assembly (3) are circumferentially arranged on the impeller (1), the elastic locking fixture block (34) is abutted against the threaded holes (10) under the action of the insert rod (32), and a threaded connection sleeve (313) is arranged at the end part of the hexagon bolt head (312), the blocking cover (33) is arranged on the threaded connecting sleeve (313), and the inner wall of the blocking cover (33) is abutted against the inserted rod (32) to prevent the inserted rod (32) from being separated from the central mounting cavity (310).
4. A water pump impeller with a sealing structure according to claim 1, wherein: impeller nut (5) have seted up second annular seal groove (51), third annular seal groove (52) towards the one end of wheel hub (11), install first elastic sealing element (6) in second annular seal groove (51), install first O type sealing washer (53) in third annular seal groove (52).
5. A water pump impeller with a sealing structure according to claim 1, wherein: the shaft sleeve (7) is provided with a third annular sealing groove (71) and a fourth annular sealing groove (72) towards one end of the hub (11), a second elastic sealing element (8) is installed in the third annular sealing groove (71), and a second O-shaped sealing ring (73) is installed in the fourth annular sealing groove (72).
6. A water pump impeller with a sealing structure according to any one of claims 1 to 5, wherein: first elastic sealing element (6) are including clamp plate (61), seal (62) and spring (63), clamp plate (61) are the loop configuration, and one side is installed in second annular seal groove (51) of impeller nut (5) through a plurality of spring (63), and seal (62) are installed to the opposite side, the inner circle of seal (62), outer lane closely cooperate with inner circle, the outer lane of second annular seal groove (51) respectively, one end and wheel hub (11) of seal (62) orientation wheel hub (11) closely cooperate mutually, and second elastic sealing element (8) are the same with the structure of first elastic sealing element (6).
7. A water pump impeller with a sealing structure according to claim 6, wherein: the one end of sealing body (62) orientation wheel hub (11) is equipped with a plurality of protruding sealing ring (621), protruding sealing ring (621) closely cooperate with wheel hub (11) mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110804515.7A CN113513498B (en) | 2021-07-16 | 2021-07-16 | Water pump impeller with sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110804515.7A CN113513498B (en) | 2021-07-16 | 2021-07-16 | Water pump impeller with sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113513498A true CN113513498A (en) | 2021-10-19 |
| CN113513498B CN113513498B (en) | 2024-02-02 |
Family
ID=78067702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110804515.7A Active CN113513498B (en) | 2021-07-16 | 2021-07-16 | Water pump impeller with sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113513498B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04265492A (en) * | 1990-10-31 | 1992-09-21 | Itt Corp | High speed pump |
| KR19980040326A (en) * | 1996-11-29 | 1998-08-17 | 임광현 | Sealing device of the pump |
| CN201382012Y (en) * | 2009-03-05 | 2010-01-13 | 杭州恒力泵业制造有限公司 | Connection sealing improved structure of impeller wheel boss and pump body |
| CN107313942A (en) * | 2017-06-08 | 2017-11-03 | 三联泵业股份有限公司 | The single-stage double-suction middle-opening pump that a kind of anti-seal ring comes off |
| CN209875540U (en) * | 2019-01-22 | 2019-12-31 | 启东市乘龙密封有限公司 | Semi-closed water pump sealing element |
| CN112283115A (en) * | 2020-10-30 | 2021-01-29 | 天长市龙源泵阀有限公司 | High leakproofness's axial-flow pump for sewage treatment |
| KR102235860B1 (en) * | 2020-07-20 | 2021-04-02 | 최귀선 | Centrifugal pump equipped with a wear ring device with a function to prevent foreign substances from jamming |
| CN213088501U (en) * | 2020-09-01 | 2021-04-30 | 浙江恒鼎机械有限公司 | Wheel hub bearing that leakproofness is good |
-
2021
- 2021-07-16 CN CN202110804515.7A patent/CN113513498B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04265492A (en) * | 1990-10-31 | 1992-09-21 | Itt Corp | High speed pump |
| KR19980040326A (en) * | 1996-11-29 | 1998-08-17 | 임광현 | Sealing device of the pump |
| CN201382012Y (en) * | 2009-03-05 | 2010-01-13 | 杭州恒力泵业制造有限公司 | Connection sealing improved structure of impeller wheel boss and pump body |
| CN107313942A (en) * | 2017-06-08 | 2017-11-03 | 三联泵业股份有限公司 | The single-stage double-suction middle-opening pump that a kind of anti-seal ring comes off |
| CN209875540U (en) * | 2019-01-22 | 2019-12-31 | 启东市乘龙密封有限公司 | Semi-closed water pump sealing element |
| KR102235860B1 (en) * | 2020-07-20 | 2021-04-02 | 최귀선 | Centrifugal pump equipped with a wear ring device with a function to prevent foreign substances from jamming |
| CN213088501U (en) * | 2020-09-01 | 2021-04-30 | 浙江恒鼎机械有限公司 | Wheel hub bearing that leakproofness is good |
| CN112283115A (en) * | 2020-10-30 | 2021-01-29 | 天长市龙源泵阀有限公司 | High leakproofness's axial-flow pump for sewage treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113513498B (en) | 2024-02-02 |
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