CN217489545U - U-shaped groove flow choking type magnetic suspension centrifugal pump head - Google Patents
U-shaped groove flow choking type magnetic suspension centrifugal pump head Download PDFInfo
- Publication number
- CN217489545U CN217489545U CN202121443059.XU CN202121443059U CN217489545U CN 217489545 U CN217489545 U CN 217489545U CN 202121443059 U CN202121443059 U CN 202121443059U CN 217489545 U CN217489545 U CN 217489545U
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- China
- Prior art keywords
- shaped groove
- impeller shell
- liquid
- magnetic suspension
- pump head
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- Expired - Fee Related
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- 239000000725 suspension Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 42
- 239000012530 fluid Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 210000004369 blood Anatomy 0.000 description 3
- 239000008280 blood Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000601 blood cell Anatomy 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a pump head of a U-shaped groove flow choking magnetic suspension centrifugal pump, which comprises an upper end cover (1), an impeller shell (2) and a base (3); the impeller shell (2) is designed with a liquid dredging center post (2-1) structure, a blade (2-2) structure and an outer edge baffle wall (2-3) structure for preventing liquid from infiltrating downwards; the impeller shell (2) is matched with the base (3) to realize the function of preventing liquid from entering the U-shaped groove (3-3); the utility model discloses can avoid liquid to receive the condition of big shear stress because of oozing down in the gap, realize the damage to centrifugal liquid minimum, this structure has improved the hydraulic performance of pump.
Description
Technical Field
The utility model belongs to the fluid transportation field relates to a microminiature centrifugal blood pump to the low damage of fluid, in particular to hinders the fluid and enters into the magnetic suspension centrifugal pump head in the U type groove.
Background
A pump is a device that delivers or pressurizes a fluid and can transfer other external energy to the fluid, causing the energy of the fluid to increase. The magnetic suspension centrifugal pump has the advantages that the magnetic suspension technology is used, so that the damage to centrifugal liquid in the operation process of the pump is small, and the magnetic suspension centrifugal pump is widely applied to the fields of medicine, artificial heart and the like which need to protect liquid from being damaged.
Currently, an electromagnetic drive rotating device is disclosed in the specification of US 10707734B2, which discloses a separation structure of a stator and a rotor of a magnetic suspension centrifugal pump motor, the separation structure of the stator and the rotor of the magnetic suspension centrifugal pump motor has become known, and the design of a pump head shell has become a means for reducing liquid damage. Liquid flow through pump headIs/are as followsThe inflow channel flows into the pump, and flows out of the pump head from the pump outflow channel after accelerated centrifugation of the impeller in the centrifugal pump head. The specification of the Chinese invention patent CN 110585502A discloses an in vitro short and medium magnetic suspension centrifugal blood pump, wherein in the design of a centrifugal pump head, an impeller rotates in a suspended manner inside a pump shell, and liquid can circulate in a groove body of the pump shell. This structure has the following disadvantages: 1) liquid enters the tank body due to hydraulic pressure, and is subjected to larger shear stress in the processes of entering and flowing out of the tank, so that the liquid is greatly damaged; 2) the liquid in the grooves is subjected to a large force due to the vibration, impact and squeezing action of the rotor, thereby causing large damage to the liquid.
The utility model discloses a design contains the impeller casing of outer fringe retaining wall structure for liquid is difficult to flow at the inslot, has avoided liquid to receive the damage because flow into the cell body.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a U type groove choked flow formula magnetic suspension centrifugal pump head shell structure, it can avoid producing the damage because of liquid gets into in the groove.
In order to realize the purpose, the technical scheme of the utility model is that: a pump head of a U-shaped groove flow-blocking magnetic suspension centrifugal pump comprises an upper end cover, an impeller shell with a central column and a base; the upper end cover is provided with a pump inlet channel and the upper half part of a centrifugal outflow channel; the base is provided with a U-shaped groove, and the lower half part of the centrifugal outflow channel is arranged; the impeller shell is suspended and rotated in the middle of the pump shell, and is characterized in that: the impeller shell is provided with an outer edge baffle wall, and the impeller shell and the base form a stepped flow channel.
The impeller shell center has a center post structural style and is big end down shape for protruding cylinder, and longitudinal section border is the arc shape, and the blade is evenly arranged in the circumferencial direction, and outer fringe retaining wall and upper surface arc transition, the inside of pump be the cavity design, the purpose is for the rotor core headspace of pump. The impeller shell structure has central symmetry as a whole.
Upper end cap center department designs inlet channel, designs exit channel at the centrifugal circumference tangential direction of pump, the base has U type groove, impeller shell is rotatory at U type inslot suspension, the U type groove lateral wall of base and the impeller shell lateral wall in the cell body are separated by 0.5 ~ 1mm, have formed the ladder shape runner.
Preferably, the upper end cover, the impeller shell and the base are made of polypropylene plastics which are colorless, nontoxic and resistant to chemical corrosion.
Preferably, the liquid is difficult to flow in the tank body by designing the centrosymmetric outer edge baffle wall structure, so that the liquid is prevented from being damaged by flowing into the tank body.
The utility model provides a U type groove choked flow magnetic suspension centrifugal pump head possesses following beneficial effect:
(1) the liquid that the pump head transported the liquid in-process is little to the liquid damage of centrifugation, in the medical field, pump head blood compatibility is good, can effectually protect the blood cell not receive the damage of pump head.
(2) The overall design of the pump head enables the flow of the liquid conveyed by the centrifugal pump to be stable, and the pump head can improve the liquid conveying efficiency of the magnetic suspension centrifugal pump.
Drawings
FIG. 1 is a schematic structural diagram of a pump head of a U-shaped groove flow-blocking magnetic suspension centrifugal pump;
FIG. 2 is a schematic structural diagram of an impeller shell inside a pump head of a U-shaped groove flow-blocking magnetic suspension centrifugal pump;
fig. 3 is an exploded view of a pump head structure of a U-shaped groove flow-blocking magnetic suspension centrifugal pump.
In the figure: 1 is an upper end cover, 2 is an impeller shell, 3 is a base, 1-1 is an inflow channel, 1-2 is the upper half part of an outflow channel, 2-1 is a central column, 2-2 is a blade, 2-3 is an outer edge baffle wall, 2-4 is an impeller shell cavity, 3-1 is a threaded hole, 3-2 is the lower half part of the outflow channel, and 3-3 is a U-shaped groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1, a pump head housing of a U-shaped groove flow-blocking magnetic suspension centrifugal pump comprises an upper end cover (1), an impeller housing (2) and a base (3); the upper end cover (1) and the base (3) are fixedly connected through a threaded hole (3-2) (the connection of the upper end cover and the base can adopt connection modes such as screws, buckles, pin connection and the like); the upper end cover (1), the impeller shell (2) and the base (3) are coaxially arranged; the cavity between the upper end cover (1) and the impeller shell (2) is a water pumping chamber, the inflow channel (1-1) is the inlet end of liquid, and the liquid flows into the pump and is guided by the central column (2-1) to be accelerated and centrifuged by the impeller (2-2)，The pump head flows out of the outflow channel (3-2); the clearance between the outer edge retaining wall (2-3) and the base (3) is 0.5-1 mm.
As shown in fig. 2, the structure of the impeller shell comprises a central column (2-1) for channeling the liquid flowing into the pump head from the inflow channel (1-1) to each blade, a blade (2-2) for accelerating the rotation of the liquid and an outer edge baffle wall (2-3) for preventing the liquid from entering the U-shaped groove, and an inner cavity (2-4) of the impeller shell is a reserved space for placing a rotor core. The central column (2-1) is used for dredging liquid flowing into the pump head, the blades (2-2) are used for accelerating the liquid flowing into the pump to rotate, the outer edge baffle wall (2-3) is used for preventing the liquid from entering a U-shaped groove of the base (3), and a cavity (2-4) in the impeller shell is used for reserving a space for placing a rotor iron core.
Before the impeller shell is used, the impeller shell (2) is placed in a U-shaped groove (3-3) of a base (3), the gap between the impeller shell and the U-shaped groove is 0.5-1 mm, an upper end cover (1) is closed, and the upper end cover (1) is fixedly connected with the base (3) through screws at the positions of threaded holes (3-1); the liquid inlet channel (1-1) and the liquid outlet channel (1-2) and (3-2) are respectively connected by using a pipeline, liquid flows into the pump head from the liquid inlet channel (1-1) through the pipeline, the impeller shell (2) starts to rotate under the action of an external rotating magnetic field, torque acts on the blades (2-2) through the rotor iron core, the blades (2-2) rotate synchronously with the impeller shell, the liquid is accelerated under the action of the rotating blades (2-2), and the liquid flows out of the pump head from the liquid outlet channel (1-2) and (3-2) under the centrifugal action; under the action of pressure in the liquid, as the impeller structure has central symmetry and only one peripheral step-shaped gap exists between the impeller shell (2) and the base (3), the liquid is not easy to flow into the lower U-shaped groove body (3-3); when the magnetic suspension centrifugal pump operates, only the blade (2-2) is used as a damage source for the liquid.
The above description is only a preferred embodiment of the present invention, and should not be taken as a basis for limiting the scope of the present invention. It should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations are also considered to be within the protection scope of the present invention.
Claims (4)
1. A pump head of a U-shaped groove flow choking magnetic suspension centrifugal pump comprises an upper end cover (1), an impeller shell (2) with a central column (2-1) and a base (3); the upper end cover (1) is designed into an inflow channel (1-1), and the upper end cover (1) is designed into an outflow channel upper half part (1-2); the base (3) is provided with a U-shaped groove (3-3), and the base (3) is provided with a lower half part (3-2) of an outflow channel; the method is characterized in that: the impeller shell (2) is provided with an outer edge retaining wall (2-3), and the impeller shell (2) and the base (3) form a step structure.
2. The pump head of the U-shaped groove flow-blocking magnetic suspension centrifugal pump according to claim 1, wherein: the structural style of a central column (2-1) of the impeller shell (2) is in a convex cone shape, and the edge of a longitudinal section is in an arc shape.
3. The pump head of the U-shaped groove flow-blocking magnetic suspension centrifugal pump according to claim 1, wherein: the impeller shell cavity (2-4) of the impeller shell (2) is designed to be hollow; the impeller shell (2) has central symmetry in the whole structure.
4. The pump head of the U-shaped groove flow-blocking magnetic suspension centrifugal pump according to claim 1, wherein: the impeller shell (2) is suspended and rotated in the U-shaped groove (3-3), the side wall of the U-shaped groove (3-3) is separated from the side wall of the impeller shell (2) by 0.5-1 mm, and a stepped flow channel is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121443059.XU CN217489545U (en) | 2021-06-28 | 2021-06-28 | U-shaped groove flow choking type magnetic suspension centrifugal pump head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121443059.XU CN217489545U (en) | 2021-06-28 | 2021-06-28 | U-shaped groove flow choking type magnetic suspension centrifugal pump head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217489545U true CN217489545U (en) | 2022-09-27 |
Family
ID=83337756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121443059.XU Expired - Fee Related CN217489545U (en) | 2021-06-28 | 2021-06-28 | U-shaped groove flow choking type magnetic suspension centrifugal pump head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217489545U (en) |
-
2021
- 2021-06-28 CN CN202121443059.XU patent/CN217489545U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220927 |