CN116696788A - Sealed centrifugal pump device - Google Patents

Sealed centrifugal pump device Download PDF

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Publication number
CN116696788A
CN116696788A CN202310573513.0A CN202310573513A CN116696788A CN 116696788 A CN116696788 A CN 116696788A CN 202310573513 A CN202310573513 A CN 202310573513A CN 116696788 A CN116696788 A CN 116696788A
Authority
CN
China
Prior art keywords
impeller
centrifugal pump
pump shaft
sealing
blade
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.)
Pending
Application number
CN202310573513.0A
Other languages
Chinese (zh)
Inventor
崔宝玲
韩磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sci Tech University ZSTU
Original Assignee
Zhejiang Sci Tech University ZSTU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Sci Tech University ZSTU filed Critical Zhejiang Sci Tech University ZSTU
Priority to CN202310573513.0A priority Critical patent/CN116696788A/en
Publication of CN116696788A publication Critical patent/CN116696788A/en
Pending legal-status Critical Current

Links

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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/08—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
    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • 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
    • F04D29/24—Vanes
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The application discloses a sealed centrifugal pump device. Offer delivery port and water inlet in the centrifugal pump shell, the inside at centrifugal pump shell is placed to the impeller, motor element is located centrifugal pump shell's rear side, the pump shaft is located between centrifugal pump shell and the motor element, pass through seal installation mechanism and impeller connection behind the through-hole on the centrifugal pump shell is worn to establish to the one end of pump shaft, the other end is fixed connection with motor element's output, fixedly connected with blade on the impeller, seal round plate sets up at the pump shaft front side, seal round plate passes through bolt and pump shaft fixed connection, the annular seal groove of sealing washer has been seted up to the impeller front end, sealing washer and seal round plate fixed connection, the draw-in groove of fixture block has been seted up to the impeller rear end, the fixture block is fixed on the pump shaft, be equipped with corrosion protection layer and metal wear pad on the outer wall of blade in proper order. According to the application, the pump shaft and the impeller are in sealing connection, the anti-corrosion layer and the metal wear-resistant piece ensure that the service life of the blade is long, the water flow friction loss is small, and the working efficiency of the centrifugal pump is high.

Description

Sealed centrifugal pump device
Technical Field
The application belongs to the technical field of centrifugal pumps, and particularly relates to a sealed centrifugal pump device.
Background
The centrifugal pump is a pump that conveys liquid by centrifugal force generated when the impeller rotates, and is operated by centrifugal motion of water by rotation of the impeller. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to do high-speed rotation movement, the water is centrifugally moved and thrown to the outer edge of the impeller, and the water flows into the water pressing pipeline of the water pump through the runner of the volute pump shell.
The impeller is one of the essential parts of the centrifugal pump, the impeller drives the blades to rotate at a high speed to realize liquid conveying, the roughness of the surfaces of the blades directly influences the hydraulic efficiency of the centrifugal pump, if the blades convey the liquid containing solid particles for a long time, the solid particles collide with the blades for a long time, abrasion is caused to the blades, the roughness of the surfaces of the blades is increased, the resistance between the surface roughness of the blades and the liquid is increased, the working efficiency of the centrifugal pump is further reduced, and the use of the centrifugal pump is influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the application aims to design a sealed centrifugal pump device.
The technical scheme of the application is as follows:
the device comprises a centrifugal pump shell, a pump shaft, an annular impeller, a seal mounting mechanism and a motor assembly; the top of the centrifugal pump shell is provided with an opening serving as a water outlet of the device, the front end of the side wall of the centrifugal pump shell is provided with an opening serving as a water inlet of the device, the impeller is placed in the centrifugal pump shell, the rear end of the side wall of the centrifugal pump shell is provided with a through hole, the motor component is positioned at the rear side of the centrifugal pump shell, the pump shaft is positioned between the centrifugal pump shell and the motor component, one end of the pump shaft penetrates through the through hole on the centrifugal pump shell and is fixedly connected with the impeller through the sealing installation mechanism, and the other end of the pump shaft is fixedly connected with the output end of the motor component; the impeller is fixedly connected with blades;
the forward direction of the device is the direction of the device approaching the centrifugal pump housing, and the backward direction of the device is the direction of the device approaching the motor assembly.
The sealing installation mechanism comprises a sealing circular plate, a sealing ring, a clamping block and an annular sealing sleeve; the pump shaft is sleeved in the middle of the impeller, the front end face of the pump shaft is flush with the front end face of the impeller, the sealing circular plate is arranged on the front side of the pump shaft, and the diameter of the sealing circular plate is larger than that of the pump shaft so that the inner periphery and the outer periphery of the sealing circular plate are respectively contacted with the pump shaft and the impeller, and the inner periphery of the sealing circular plate is fixedly connected with the pump shaft through bolts; the front end of impeller has seted up annular seal groove, is equipped with annular sealing washer in the annular seal groove, fixed connection between the periphery of the front end of sealing washer and sealed plectane rear end, and a plurality of draw-in groove has been seted up to the inner periphery of impeller rear end, is equipped with the fixture block in the draw-in groove, and fixture block fixed mounting is on the lateral wall of pump shaft.
The pump shaft outer side wall is sleeved with a sealing sleeve, and the sealing sleeve is positioned at a position close to the rear side of the clamping block.
The periphery of impeller front end fixed mounting has a plurality of blade, and the blade sets up along the even interval of circumference of impeller.
And the outer wall of the blade is sequentially provided with an anti-corrosion layer and a metal wear-resistant sheet.
The surface of the metal wear-resistant sheet is provided with a smooth polishing layer.
The metal wear-resistant sheet is made of wear-resistant chromium cast iron materials.
The clamping grooves are uniformly arranged at intervals along the circumferential direction of the impeller, and the openings of the clamping grooves face the middle of the impeller.
The application has the beneficial effects that:
1. according to the application, the outer wall of the blade is protected by the anti-corrosion layer, the metal wear-resisting sheet and the smooth polishing layer, so that solid particles in liquid can be prevented from directly contacting the blade, the service life of the blade is prolonged, the smooth polishing layer ensures good smoothness of the metal wear-resisting sheet, the friction loss of water flow is reduced, and the working efficiency of the centrifugal pump is further improved.
2. According to the application, one end of the pump shaft can be fixed in the impeller through the cooperation between the sealing circular plate and the bolt, the stability of the pump shaft and the impeller during installation is ensured through the cooperation of the clamping groove, the clamping block and the sealing sleeve, and the tightness of the pump shaft at one end and the impeller during installation is increased through the cooperation of the sealing circular plate, the sealing ring and the annular sealing groove.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present application.
Fig. 2 is a schematic sectional view of a part of the structure of the impeller of the present application.
Fig. 3 is a rear side schematic view of the impeller structure of the present application.
Fig. 4 is a schematic view of the front side of the impeller structure of the present application.
Fig. 5 is a schematic view of the structure of the blade, corrosion protection layer and metal wear pad of the present application.
Fig. 6 is a schematic view of the structure of the metal wear pad and the smooth polishing layer of the present application.
Wherein: 1. a centrifugal pump housing; 2. a water inlet; 3. a water outlet; 4. a pump shaft; 5. an impeller; 6. a seal mounting mechanism; 7. a blade; 8. an anti-corrosion layer; 9. metal wear-resistant sheet; 10. a smooth polishing layer; 11. a motor assembly; 61. a sealing circular plate; 62. a bolt; 63. a seal ring; 64. an annular seal groove; 65. a clamping groove; 66. a clamping block; 67. and (5) sealing the sleeve.
Detailed Description
The embodiments of the present application will be described more fully with reference to the drawings in the present application, and the configurations of the structures described in the following embodiments are merely examples, and the centrifugal pump sealing structure according to the present application is not limited to the structures described in the following embodiments, but all other embodiments obtained by a person skilled in the art without making any creative effort are within the scope of protection of the present application.
As shown in fig. 1, the device in the implementation comprises a hollow barrel-shaped centrifugal pump housing 1, a pump shaft 4, an annular impeller 5, a seal mounting mechanism and a motor assembly 11; the top of the centrifugal pump shell 1 is provided with an opening serving as a water outlet 3 of the device, the front end of the side wall of the centrifugal pump shell 1 is provided with an opening serving as a water inlet 2 of the device, the impeller 5 is placed in the centrifugal pump shell 1, the rear end of the side wall of the centrifugal pump shell 1 is provided with a through hole, the motor component 11 is positioned at the rear side of the centrifugal pump shell 1, the pump shaft 4 is positioned between the centrifugal pump shell 1 and the motor component 11, one end of the pump shaft 4 penetrates through the through hole on the centrifugal pump shell 1 and is fixedly connected with the impeller 5 through a sealing installation mechanism, and the other end of the pump shaft 4 is fixedly connected with the output end of the motor component 11; the impeller 5 is fixedly connected with blades 7;
the forward direction of the device is the direction of approach of the centrifugal pump housing 1 in the device, and the backward direction of the device is the direction of approach of the motor assembly 11 in the device.
As shown in fig. 2 to 4, the seal mounting mechanism includes a seal circular plate 61, a seal ring 63, a fixture block 66, and an annular seal sleeve 67; the pump shaft 4 is sleeved in the middle of the impeller 5, the front end face of the pump shaft 4 is flush with the front end face of the impeller 5, the sealing circular plate 61 is arranged on the front side of the pump shaft 4, the diameter of the sealing circular plate 61 is larger than that of the pump shaft 4, so that the inner periphery and the outer periphery of the sealing circular plate 61 are respectively contacted with the pump shaft 4 and the impeller 5, and the inner periphery of the sealing circular plate 61 is fixedly connected with the pump shaft 4 through a bolt 62; the front end of impeller 5 has seted up annular seal groove 64, annular seal groove 64's opening forward is equipped with annular sealing washer 63 in the annular seal groove 64, fixed connection between the front end of sealing washer 63 and the periphery of sealed plectane 61 rear end, the periphery of sealed plectane 61 is through sealing washer 63 and the front end card of impeller 5 is dead, a plurality of draw-in groove 65 has been seted up to the inner periphery of impeller 5 rear end, the round hole in the middle of the opening orientation impeller 5 of draw-in groove 65 for draw-in groove 65 communicates with the round hole in the middle of the impeller 5, be equipped with fixture block 66 in the draw-in groove 65, and fixture block 66 fixed mounting is on the lateral wall of pump shaft 4, the rear end of impeller 5 is dead through fixture block 66 and the lateral wall card of pump shaft 4.
A certain gap is reserved between the sealing ring 63 and the annular sealing groove 64, and a certain gap is reserved between the clamping block 66 and the clamping groove 65, so that the impeller 5 is prevented from being worn too much at the positions of the annular sealing groove 64 and the clamping groove 65, and the durability of the device is prevented from being affected.
A sealing sleeve 67 is sleeved on the outer side wall of the pump shaft 4, and the sealing sleeve 67 is positioned at a position close to the rear side of the clamping block 66.
The periphery fixed mounting of impeller 5 front end has a plurality of blade 7, and blade 7 sets up along the even interval of circumference of impeller 5, and the shape of blade 7 is the curve, and each blade 7 is put in same direction, and same direction is anticlockwise or clockwise.
A small gap is reserved between the blade 7 and the periphery of the sealing circular plate 61 so as to prevent the blade 7 from being extruded and worn by the sealing circular plate 61, the working efficiency and the durability of the device in use are affected, and the service life of the blade 7 is prolonged.
As shown in fig. 5 and 6, the outer wall of the blade 7 is provided with an anticorrosive layer 8 and a metal wear plate 9 in this order from inside to outside, and the anticorrosive layer 8 is closest to the blade 7.
The surface of the metal wear pad 9 is provided with a smooth polishing layer 10.
The metal wear pad 9 is made of wear-resistant chrome cast iron or other materials with good wear resistance.
The clamping grooves 65 are uniformly arranged at intervals along the circumferential direction of the impeller 5, and the openings of the clamping grooves 65 face the middle of the impeller 5.
The seal circular plate 61 is provided with a hole with threads, and a bolt 62 is sleeved on the thread, and one end of the bolt 62 penetrates through the seal circular plate 61 and is connected to the front end of the pump shaft 4.
In this embodiment, the pump shaft 4 drives the sealing sleeve 67 to move forward to compress the impeller 5 by clamping a plurality of clamping blocks 66 on the outer wall of the pump shaft 4 into the clamping grooves 65 on the rear end of the impeller 5, so that the impeller 5 can be limited, the sealing circular plate 61 is fixed on the front end of the pump shaft 4 by using the bolts 62, and the sealing ring 63 on the rear side of the sealing circular plate 61 is sleeved into the annular sealing groove 64 on the front side of the impeller 5, so that sealing installation can be performed between one end of the pump shaft 4 and the impeller 5.
The corrosion resistance of the blade 7 is increased through the anti-corrosion layer 8, the blade 7 is prevented from being corroded by corrosive materials in liquid, the metal wear-resisting piece 9 is made of wear-resistant chromium cast iron, the wear-resistant chromium cast iron has good wear resistance, the service life of the blade 7 is prolonged, the outer wall of the metal wear-resisting piece 9 is polished into a smooth polishing layer 10 through an abrasive particle flow process, good smoothness of the metal wear-resisting piece 9 is guaranteed through the smooth polishing layer 10, friction loss of water flow is reduced, and further the working efficiency of the centrifugal pump is improved.
The impeller 5 and the blades 7 can be driven to rotate at high speed through the cooperation of the motor assembly 11 and the pump shaft 4, so that liquid is conveyed, enters the centrifugal pump housing 1 through the water inlet 2 and is discharged through the water outlet 3.
When the device is used, the front end of the pump shaft 4 is sleeved with the inside of the impeller 5, meanwhile, the pump shaft 4 drives the clamping block 66 to be clamped into the inner cavity of the clamping groove 65, meanwhile, the pump shaft 4 drives the sealing sleeve 67 to move forwards to press the impeller 5, so that the impeller 5 is initially limited, the sealing circular plate 61 is moved to the front end of the pump shaft 4, the sealing circular plate 61 and the sealing ring 63 are driven to be clamped into the inside of the annular sealing groove 64, the sealing circular plate 61 is fixedly connected with the front end of the pump shaft 4 through the bolts 62, and sealing installation can be carried out between one end of the pump shaft 4 and the impeller 5, for example, when the centrifugal pump device works, the output end of the motor assembly 11 drives the impeller 5 and the blades 7 to rotate at a high speed through the pump shaft 4, liquid is conveyed, the abrasion resistance of the blades 7 is improved through the metal abrasion resistance sheets 9, and the service life of the blades 7 is further prolonged.
The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;
secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;
finally: the foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the application are intended to be included within the scope of the application.

Claims (8)

1. A sealed centrifugal pump apparatus, characterized in that:
comprises a centrifugal pump shell (1), a pump shaft (4), an annular impeller (5), a seal mounting mechanism and a motor assembly (11); the top of the centrifugal pump housing (1) is provided with an opening serving as a water outlet (3) of the device, the front end of the side wall of the centrifugal pump housing (1) is provided with an opening serving as a water inlet (2) of the device, the impeller (5) is placed in the centrifugal pump housing (1), the rear end of the side wall of the centrifugal pump housing (1) is provided with a through hole, the motor component (11) is positioned at the rear side of the centrifugal pump housing (1), the pump shaft (4) is positioned between the centrifugal pump housing (1) and the motor component (11), one end of the pump shaft (4) penetrates through the through hole on the centrifugal pump housing (1) and then is fixedly connected with the impeller (5) through a sealing installation mechanism, and the other end of the pump shaft (4) is fixedly connected with the output end of the motor component (11); the impeller (5) is fixedly connected with blades (7);
the forward direction of the device is the direction of approaching the centrifugal pump housing (1) in the device, and the backward direction of the device is the direction of approaching the motor assembly (11) in the device.
2. A sealed centrifugal pump device according to claim 1, wherein:
the sealing installation mechanism comprises a sealing circular plate (61), a sealing ring (63), a clamping block (66) and an annular sealing sleeve (67); the pump shaft (4) is sleeved in the middle of the impeller (5), the front end face of the pump shaft (4) is flush with the front end face of the impeller (5), the sealing circular plate (61) is arranged on the front side of the pump shaft (4), the diameter of the sealing circular plate (61) is larger than that of the pump shaft (4) so that the inner periphery and the outer periphery of the sealing circular plate (61) are respectively contacted with the pump shaft (4) and the impeller (5), and the inner periphery of the sealing circular plate (61) is fixedly connected with the pump shaft (4) through bolts (62); an annular sealing groove (64) is formed in the front end of the impeller (5), an annular sealing ring (63) is arranged in the annular sealing groove (64), the front end of the sealing ring (63) is fixedly connected with the periphery of the rear end of the sealing circular plate (61), a plurality of clamping grooves (65) are formed in the inner periphery of the rear end of the impeller (5), clamping blocks (66) are arranged in the clamping grooves (65), and the clamping blocks (66) are fixedly mounted on the outer side wall of the pump shaft (4).
3. A sealed centrifugal pump device according to claim 2, wherein:
the pump shaft (4) is sleeved with a sealing sleeve (67), and the sealing sleeve (67) is positioned at a position close to the rear side of the clamping block (66).
4. A sealed centrifugal pump device according to claim 1, wherein:
the periphery of impeller (5) front end is fixed mounting has a plurality of blade (7), and blade (7) are evenly spaced along the circumference of impeller (5).
5. A sealed centrifugal pump apparatus according to claim 4, wherein:
an anti-corrosion layer (8) and a metal wear-resisting sheet (9) are sequentially arranged on the outer wall of the blade (7).
6. A sealed centrifugal pump apparatus according to claim 5, wherein:
the surface of the metal wear-resistant sheet (9) is provided with a smooth polishing layer (10).
7. A sealed centrifugal pump apparatus according to claim 5, wherein:
the metal wear-resistant sheet (9) is made of wear-resistant chromium cast iron materials.
8. A sealed centrifugal pump device according to claim 2, wherein:
the clamping grooves (65) are uniformly arranged at intervals along the circumferential direction of the impeller (5), and the openings of the clamping grooves (65) face the middle of the impeller (5).
CN202310573513.0A 2023-05-18 2023-05-18 Sealed centrifugal pump device Pending CN116696788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310573513.0A CN116696788A (en) 2023-05-18 2023-05-18 Sealed centrifugal pump device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310573513.0A CN116696788A (en) 2023-05-18 2023-05-18 Sealed centrifugal pump device

Publications (1)

Publication Number Publication Date
CN116696788A true CN116696788A (en) 2023-09-05

Family

ID=87834917

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310573513.0A Pending CN116696788A (en) 2023-05-18 2023-05-18 Sealed centrifugal pump device

Country Status (1)

Country Link
CN (1) CN116696788A (en)

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