CN110397627B - Water inlet structure of water pump - Google Patents
Water inlet structure of water pump Download PDFInfo
- Publication number
- CN110397627B CN110397627B CN201910663466.2A CN201910663466A CN110397627B CN 110397627 B CN110397627 B CN 110397627B CN 201910663466 A CN201910663466 A CN 201910663466A CN 110397627 B CN110397627 B CN 110397627B
- Authority
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- China
- Prior art keywords
- ring
- water inlet
- sealing ring
- water
- impeller
- 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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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000007789 sealing Methods 0.000 claims abstract description 67
- 238000009434 installation Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 239000003381 stabilizer Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
-
- 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
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4293—Details of fluid inlet or outlet
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
- F04D29/447—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps rotating diffusers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a water inlet structure of a water pump, which solves the problems of relatively poor operation working efficiency and relatively high energy consumption of the conventional common water pump and adopts the following technical scheme: the utility model provides a water pump water inlet structure, sets up the exit of inlet tube in the pump body, a serial communication port, including the sealing ring, the tip of impeller towards the inlet tube is equipped with the protruding ring, and protruding ring clearance ground peg graft in the sealing ring, is provided with annular mouth ring in the entrance point department of outlet pipe, is formed with the installation cavity in the mouth ring, and the internal diameter of installation cavity is greater than the external diameter of sealing ring, and the thickness of installation cavity is greater than the thickness of sealing ring, and the sealing ring movably sets up in the installation cavity.
Description
Technical Field
The invention relates to a water pump, in particular to a water inlet structure for supplying water on the water pump to flow into an impeller cavity so as to be pushed out to the outer side of a pump body by an impeller.
Background
Chinese patent document (publication No. 109854518A) discloses a water inlet structure of a submersible pump, and belongs to the technical field of water pumps. It has solved the unreasonable problem of current immersible pump structural design, application scope is little. This water inlet structure of immersible pump locates the water inlet department of pump body bottom, including being used for making the water inlet below form the base of sealed cavity and wear to locate a plurality of stabilizer blades that are used for playing the supporting role to the pump body in the base, the water inlet of pump body bottom and this sealed cavity intercommunication, the stabilizer blade slope sets up, is formed with the contained angle between the lower terminal surface of stabilizer blade and the ground, has the water inlet channel with sealed cavity intercommunication in the stabilizer blade, water inlet end of water inlet channel is located the lower terminal surface of stabilizer blade. The invention has the advantages of reasonable structural design, wide application range and the like.
The water inlet structure of the submersible pump comprises a water inlet, the water inlet is opposite to the axial end part of the impeller, no device is arranged between the water inlet and the end part of the impeller, so that the water inlet efficiency of the pump is relatively low, the working efficiency of the impeller is low, and the working energy consumption of the water pump is relatively high.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the water inlet structure of the water pump can well adapt to the water inlet requirement of the water pump, is beneficial to water inlet of the water pump and reduces the working energy consumption of the water pump.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a water pump water inlet structure, sets up the exit of inlet tube in the pump body, a serial communication port, including the sealing ring, the tip of impeller towards the inlet tube is equipped with the protruding ring, and the protruding ring is pegged graft in the sealing ring with the clearance, is provided with annular mouth ring in the entrance point department of inlet tube, is formed with the installation cavity in the mouth ring, and the internal diameter of installation cavity is greater than the external diameter of sealing ring, and the thickness of installation cavity is greater than the thickness of sealing ring, and the sealing ring movably sets up in the installation cavity.
The sealing ring is arranged at the outlet end of the water inlet pipe in the pump body of the water pump and is positioned in the pump body. The water inlet pipe is used for leading water into the impeller cavity from the outside, and the pump body is also provided with a water outlet pipe for leading water to flow out towards the outer side of the pump body under the pushing of the impeller. The sealing ring is matched with the protruding ring to form a sealing structure, and water enters the impeller cavity from the inner part of the sealing ring, so that water cannot overflow due to the limitation of the sealing ring and the protruding ring. In the rotation process of the impeller, the sealing ring can be driven by the protruding ring or under the pressure of water, so that certain radial position change can occur.
Further, the impeller comprises a bracket, a plurality of blades are arranged on the bracket, a horn-shaped guide cover is connected with the blades, the end faces of the blades, which face the sealing ring, are connected with the inner wall surface of the guide cover into a whole, and the protruding ring is positioned at the opening of the small end of the guide cover. Be provided with the kuppe in impeller blade's relevant position department, assemble the water conservancy diversion through the kuppe to adapt to the existence of protruding ring well, be convenient for inject the direction of liquid stream, make the liquid stream that enters into the pump body fully act on with the impeller, the blade of being convenient for promotes the liquid stream, is favorable to improving the lift of water pump.
Further, the mouth ring comprises a bottom ring and a pressing ring, the cut sections of the bottom ring and the pressing ring are all L-shaped, the bottom ring and the pressing ring are buckled together, and the installation cavity is formed between the bottom ring and the pressing ring. The split type structure of mouth ring has made things convenient for the assembly to mouth ring and sealing ring.
Further, a rabbet is arranged at the inlet end of the water outlet pipe, the rabbet ring is arranged in the rabbet, the radial outer port part of the bottom ring is externally skimmed and elastically pressed on the inner peripheral surface of the rabbet, and the radial outer port part of the compression ring is externally skimmed and elastically pressed on the inner peripheral surface of the bottom ring. The bottom ring, the pressing ring and the rabbet are mutually abutted together, so that the structural stability of the mouth ring is good, and the stable supporting effect is conveniently provided for the sealing ring.
Further, the press ring is provided with a cylindrical part arranged along the axial direction of the mouth ring and a ring piece part arranged along the radial direction of the mouth ring, and an arc-shaped connecting part is formed between the cylindrical part and the ring piece part on the press ring. The end face of the sealing ring can be elastically crimped by the ring piece part, so that the crimping stability of the sealing ring is good, and the resetting of the sealing ring is facilitated.
Further, the ring piece portion is sunk inward toward the axial middle of the cylindrical portion, and the ring piece portion is for press-contact against the end face of the seal ring. Through sinking in the ring part, the size of the connecting part can be effectively improved, so that the connecting part can improve larger elasticity for the ring piece part, the crimping stability of the ring piece part to the sealing ring is further improved, and the ring piece part can provide good elastic supporting effect for the sealing ring.
Further, an annular boss is integrally formed at the radial inner side part of one end face of the sealing ring, and the boss is inserted into the compression ring in a clearance way. Through set up the boss on the sealing ring, and can effectively improve the epaxial overlap size between protruding ring and the sealing ring on the impeller, improve sealing effect between sealing ring and the protruding ring.
Further, an inner ring protruding out is integrally formed on the inner peripheral surface of one side of the boss close to the impeller, and the inner peripheral surface of the inner ring is used for being matched with the outer peripheral surface of the protruding ring. The size of the inner ring in the axial direction is far smaller than the sum of the sizes of the boss and the sealing ring in the axial direction, and the sealing ring can be further adapted to the rotation of the protruding ring by matching the inner ring with the outer peripheral surface of the protruding ring, so that the friction force of the sealing ring to the protruding ring is reduced, and the sealing ring can provide good sealing and guiding effects for water flow.
The invention has the beneficial effects that: in this water pump water inlet structure, set up the sealing ring in the exit of pump body inlet tube department, and the sealing ring cooperatees with the protruding ring on the impeller, and sealing ring and protruding ring can inject the flow direction of impeller chamber normal water to the outside of water inlet tube exit is splashed to the rivers. Because the sealing ring and the protruding ring have high structural standardization degree in the preparation process, the design requirement can be met, the matching stability of the sealing ring and the protruding ring is good, the water flow in the impeller cavity can be well limited, the working state of the water pump is ideal, the energy consumption is low, and the lift of the water pump can be effectively ensured. The sealing ring is arranged in the mouth ring in a floating manner, so that the position of the sealing ring can be well adapted to the rotation of the impeller, the preparation and assembly errors of the impeller can be effectively compensated, the sealing ring can well provide a good liquid sealing effect for water inlet of the water pump, and moreover, the sealing ring is not easy to wear, and the service life of the sealing ring can be effectively guaranteed.
Drawings
Fig. 1 is a longitudinal sectional view of a water pump with the present water intake structure.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is an enlarged view of a longitudinal section of the impeller of fig. 1.
In the figure, 1, a pump body; 2. a mouth ring; 21. a bottom ring; 221. a cylindrical portion; 222. a coupling portion; 223. a ring segment; 3. a seal ring; 31. a boss; 32. an inner ring; 4. a water inlet pipe; 5. an impeller cavity; 6. an impeller; 61. a protruding ring; 62. a guide cover; 63. a blade; 64. a bracket; 7. and a water outlet pipe.
Detailed Description
The structure of the water pump related in the water inlet structure of the water pump comprises a pump body 1, a water outlet pipe 7 and a water inlet pipe 4 are integrally formed on the pump body 1, and the pump body 1, the water outlet pipe 7 and the water inlet pipe 4 are integrally cast by iron materials. An impeller cavity 55 is formed in the pump body 1, an impeller 6 is rotatably arranged in the impeller cavity 55, and the impeller 6 is in transmission connection with a motor power output shaft and rotates in the impeller cavity 55 under the drive of the motor power output shaft.
The water inlet structure of the water pump is arranged at the outlet end of the water inlet pipe 4, the structure comprises a sealing ring 3, and the sealing ring 3 is circular and is made of plastic. A protruding ring 61 is integrally formed on the end of the impeller 6 facing the water inlet pipe 4, the protruding ring 61 protrudes toward the sealing ring 3, and the protruding ring 61 is inserted into the sealing ring 3 with a clearance. The sealing ring 3 is arranged in the pump body 1 in a floating mode, in order to limit the sealing ring 3, an annular mouth ring 2 is arranged at the inlet end of the water inlet pipe 4, an installation cavity is formed in the mouth ring 2, the inner diameter of the installation cavity is larger than the outer diameter of the sealing ring 3, the thickness of the installation cavity is larger than that of the sealing ring 3, and the sealing ring 3 is movably arranged in the installation cavity. The position of the sealing ring 3 in the mounting cavity may be changed in order to adapt to the position of the protruding ring 61 when the impeller 6 is rotated.
The impeller 6 is usually an integral part, and structurally the impeller 6 comprises a bracket 64, a plurality of blades 63 are arranged on the bracket 64, the blades 63 are curved, and the blades 63 are uniformly distributed on the end surface of the bracket 64 facing the sealing ring 3 along the circumferential direction of the bracket 64. The guide cover 62 and the blades 63 are molded integrally from a homogeneous material, the guide cover 62 is in a horn shape, and the inner peripheral surface of the guide cover 62 is in an arc-shaped trend in the axial direction. The end surfaces of the blades 63 facing the seal ring 3 are integrally connected to the inner wall surface of the guide cover 62, and the protruding ring 61 is located at the mouth of the small end of the guide cover 62. When the impeller 6 rotates in the impeller cavity 55, water enters between the blades 63 on the impeller 6 from the inside of the water inlet pipe 4 through the protruding ring 61, under the rotation action of the impeller 6, the water is thrown out from the spaced end parts between the blades 63, the impeller 6 continuously rotates, and the water enters the water outlet pipe 7 under the pushing of the blades 63, so that long-distance conveying is realized.
In order to facilitate the assembly of the water inlet structure of the water pump, the mouth ring 2 is made into a split structure, the bottom ring 21 and the compression ring with the cut-off surfaces in L shapes are buckled together to form the mouth ring 2, the installation cavity is formed between the bottom ring 21 and the compression ring, and the cut-off surface of the installation cavity is -shaped. The press ring and the bottom ring 21 are made of stainless steel, and they are generally formed by stamping. On the inner wall surface of the pump body 1, a tongue-and-groove 8 is arranged at the outlet end of the water inlet pipe 4, the section of the tongue-and-groove 8 is L-shaped, and the tongue-and-groove ring 2 is embedded in the tongue-and-groove 8. The radially outer end portion of the bottom ring 21 is elastically pressed against the inner peripheral surface of the tongue-and-groove 8 by skimming, and the radially outer end portion of the pressing ring is elastically pressed against the inner peripheral surface of the bottom ring 21 by skimming. An annular boss 31 is integrally formed at the radially inner part of one end surface of the sealing ring 3, and the boss 31 is inserted into the compression ring in a clearance manner. The boss 31 has an inner ring 32 integrally formed on an inner peripheral surface of a side close to the impeller 6, and a protruding ring 61 is inserted into the inner ring 32, and an inner peripheral surface of the inner ring 32 is fitted with an outer peripheral surface of the protruding ring 61.
When the assembly is realized, the bottom ring 21 is pressed into the rabbet 8, the sealing ring 3 is installed in the bottom ring 21, the pressing ring is pressed into the bottom ring 21 at the outer side of the sealing ring 3, and the sealing ring 3 is stabilized between the bottom ring 21 and the pressing ring. The impeller 6 is then fitted into the impeller cavity 55 such that the protruding ring 61 on the impeller 6 is inserted into the sealing ring 3.
In fig. 2, the press ring has a cylindrical portion 221 axially disposed along the ring 2 and a ring piece portion 223 radially disposed along the ring 2, and an arc-shaped coupling portion 222 is formed between the cylindrical portion 221 and the ring piece portion 223. The ring piece portion 223 is sunk inward toward the axial middle of the cylindrical portion 221, that is, the ring piece portion 223 is entirely close to the seal ring 3, so that the coupling portion 222 is relatively large in size and can provide a relatively large elastic force, and the ring piece portion 223 is used for press-contact against the end face of the seal ring 3.
Claims (5)
1. The water inlet structure of the water pump is arranged at the outlet end of the water inlet pipe in the pump body and is characterized by comprising a sealing ring, wherein the end part of the impeller, which faces the water inlet pipe, is provided with a protruding ring which is inserted into the sealing ring in a clearance manner, the inlet end of the water outlet pipe is provided with an annular mouth ring, a mounting cavity is formed in the mouth ring, the inner diameter of the mounting cavity is larger than the outer diameter of the sealing ring, the thickness of the mounting cavity is larger than the thickness of the sealing ring, and the sealing ring is movably arranged in the mounting cavity; the mouth ring comprises a bottom ring and a pressing ring, the cut sections of which are L-shaped, the bottom ring and the pressing ring are buckled together, and the installation cavity is formed between the bottom ring and the pressing ring; the outlet end of the water inlet pipe is provided with a rabbet, the rabbet ring is arranged in the rabbet, the radial outer port part of the bottom ring is externally skimmed and elastically pressed on the inner peripheral surface of the rabbet, and the radial outer port part of the pressure ring is externally skimmed and elastically pressed on the inner peripheral surface of the bottom ring; the compression ring is provided with a cylindrical part and a ring piece part, wherein the cylindrical part is axially arranged along the ring, the ring piece part is radially arranged along the ring, and an arc-shaped connecting part is formed between the cylindrical part and the ring piece part on the compression ring.
2. The water inlet structure of the water pump according to claim 1, wherein the impeller comprises a bracket, a plurality of blades are arranged on the bracket, a horn-shaped guide cover is connected with the blades, the end faces of the blades, which face the sealing ring, are connected with the inner wall face of the guide cover into a whole, and the protruding ring is positioned at the mouth part of the small end of the guide cover.
3. The water inlet structure of a water pump according to claim 1, wherein the ring piece portion is sunk inward toward an axially middle portion of the cylindrical portion, the ring piece portion being for press-contact with an end face of the seal ring.
4. The water inlet structure of a water pump according to claim 1, wherein an annular boss is integrally formed at a radially inner portion of an end face of the seal ring, and the boss is inserted into the press ring with a clearance.
5. The water inlet structure of a water pump according to claim 4, wherein the boss is integrally formed with a protruding inner ring on an inner peripheral surface of a side of the boss adjacent to the impeller, and the inner peripheral surface of the inner ring is adapted to be fitted with an outer peripheral surface of the protruding ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663466.2A CN110397627B (en) | 2019-07-22 | 2019-07-22 | Water inlet structure of water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663466.2A CN110397627B (en) | 2019-07-22 | 2019-07-22 | Water inlet structure of water pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110397627A CN110397627A (en) | 2019-11-01 |
| CN110397627B true CN110397627B (en) | 2024-03-26 |
Family
ID=68325844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910663466.2A Active CN110397627B (en) | 2019-07-22 | 2019-07-22 | Water inlet structure of water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110397627B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8514068D0 (en) * | 1984-06-04 | 1985-07-10 | Jacuzzi Europ | Centrifugal pump |
| CN1654828A (en) * | 2004-02-12 | 2005-08-17 | 韦尔-环境科技（私人）有限公司 | Rotary pump |
| EP1589229A1 (en) * | 2004-04-23 | 2005-10-26 | J. Eberspächer GmbH & Co. KG | Ventilator |
| CN201310493Y (en) * | 2008-12-18 | 2009-09-16 | 阳江市新力工业有限公司 | Stamping-welded centrifugal pump with improved structure |
| CN102588328A (en) * | 2012-03-16 | 2012-07-18 | 广东凌霄泵业股份有限公司 | Centrifugal pump |
| CN102878111A (en) * | 2011-07-14 | 2013-01-16 | 百得有限公司 | An impeller arrangement |
| CN205895680U (en) * | 2016-07-29 | 2017-01-18 | 南方中金环境股份有限公司 | Impeller sealing ring structure |
| CN210290266U (en) * | 2019-07-22 | 2020-04-10 | 浙江泰福泵业股份有限公司 | Water pump water inlet structure |
-
2019
- 2019-07-22 CN CN201910663466.2A patent/CN110397627B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8514068D0 (en) * | 1984-06-04 | 1985-07-10 | Jacuzzi Europ | Centrifugal pump |
| CN1654828A (en) * | 2004-02-12 | 2005-08-17 | 韦尔-环境科技（私人）有限公司 | Rotary pump |
| EP1589229A1 (en) * | 2004-04-23 | 2005-10-26 | J. Eberspächer GmbH & Co. KG | Ventilator |
| CN201310493Y (en) * | 2008-12-18 | 2009-09-16 | 阳江市新力工业有限公司 | Stamping-welded centrifugal pump with improved structure |
| CN102878111A (en) * | 2011-07-14 | 2013-01-16 | 百得有限公司 | An impeller arrangement |
| CN102588328A (en) * | 2012-03-16 | 2012-07-18 | 广东凌霄泵业股份有限公司 | Centrifugal pump |
| CN205895680U (en) * | 2016-07-29 | 2017-01-18 | 南方中金环境股份有限公司 | Impeller sealing ring structure |
| CN210290266U (en) * | 2019-07-22 | 2020-04-10 | 浙江泰福泵业股份有限公司 | Water pump water inlet structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110397627A (en) | 2019-11-01 |
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