CN207018256U - The Mini-type spiral pump that a kind of multistage is prewhirled - Google Patents
The Mini-type spiral pump that a kind of multistage is prewhirled Download PDFInfo
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- CN207018256U CN207018256U CN201720647757.9U CN201720647757U CN207018256U CN 207018256 U CN207018256 U CN 207018256U CN 201720647757 U CN201720647757 U CN 201720647757U CN 207018256 U CN207018256 U CN 207018256U
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- 230000032258 transport Effects 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 241001672694 Citrus reticulata Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 101100110009 Caenorhabditis elegans asd-2 gene Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
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- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses the Mini-type spiral pump that a kind of multistage is prewhirled.At a high speed there is large scale vortex core in the helicoidal pump wheel nose of rotation, and spiral pump blade and transports liquid inlet angle are larger, easily cause local eddy currents and aggravation flowing instability.Helicoidal pump sleeve lining of the present utility model offers cylindrical screw connected in star；The section of cylindrical screw connected in star is inverted isosceles trapezoid；The wheel hub of helical runner sets two panels spiral stator close to cylindrical screw connected in star one end；The helix of spiral stator is conical spiral；Projection is provided with the pressure face leaf top of spiral stator；Helical runner is provided with two panels cylindrical helical blade.The utility model make it that transport blood prewhirls in the motion that helicoidal pump sleeve lining is adjacent into formation before cylindrical helical blade；The helical runner that projection can be directed to rotation at a high speed plays drainage guide functions, the fluid on spiral stator is more flowed at the blade root of cylindrical helical blade.
Description
Technical field
The utility model belongs to fluid machinery technical field, is related to a kind of low noise, the multistage microminiature helicoidal pump prewhirled,
More particularly to a kind of inner-walls of duct have it is built-in prewhirl groove and the multistage that there is water conservancy diversion helical blade at impeller inlet end prewhirl it is miniature
Helicoidal pump.
Background technology
Pump is a kind of very extensive universal machine of application, plays huge effect in the production, life in the mankind, no
Constantly manufactured also with new application needs with the pump of species and various sizes and applied among industry-by-industry.According to
The difference of characteristic dimension, pump can be generally divided into following a few classes：Conventional pumps, microminiature pump and micropump.Wherein microminiature
Characteristic dimension scope substantially 1~50mm of pump, and the characteristic length of micropump and conventional pumps be respectively below 1mm and 50mm with
On.
Microminiature pump is because its special size range shows its good application prospect, such as the cooling system of electronic equipment
System, the temperature control system of fuel cell and present most widely used Medical Devices etc..Wherein, the heart in Medical Devices
Servicing unit is the pump machine energy that heart is partially or completely substituted using machinery or biological means, maintains the good blood circulation of whole body
The treatment method of situation.The servicing unit of early stage is mostly the diaphragm type blood pump of bionic type.Into after the nineties, external many researchs
Center turns to the research of wheeled (particularly axial-flow type) blood pump of manophyll one after another, forms the main flow in the field at present.
At present, Small blood pump is mainly two kinds of centrifugal pump and axial-flow pump in clinical practice.It is real according to clinical trial and animal
Test observation, the working effect of centrifugal pump and axial-flow pump has the problem of following：Physiology secondary requirements of the blood pump for human body：For blood
The general centrifugal pump of driving rotating speed of pump is smaller, n=4000~10000 rev/min；Axial-flow pump is larger, n=10000 revs/min with
On, such as Hemopump rotating speed can reach n=26000 revs/min.
Haemocyte is easily rupturable when by high shear force in blood pump, and high rotating speed brings Mini-type spiral pump internal flow
Complexity.Due to the design feature of helicoidal pump itself, the fluid in flowing close to spiral impeller of pump can be caused to form larger whirlpool
Nuclear structure, exacerbates flow instability, further causes the haemocyte of vortex core part to have received great shearing force.Vortex core
The presence in region is to aggravate the factor of flow instability, and causes the main reason for damaged in haemocyte transport process.
For in traditional design, because usual spiral pump blade is to be extended to be formed by helix, rotating shaft is tangent smooth, causes
Fluid forms the larger angle of attack with helical blade, and swiftly flowing fluid is directly impinging the pressure face of helical blade, enters one
Step result in larger barometric gradient on helical blade, causes the flowing instability on the pressure face of helical blade.
There is intensive microvortex structure to produce at the leading edge of helical blade and the blade tip clearance of helical blade, blade tip clearance vortex structure
In the presence of being the principal element that causes helicoidal pump internal flow unstable.In the helicoidal pump of high speed rotation, the big chi of blade tip clearance
Very little vortex structure can be broken into small size vortex structure, and turbo-charger set produces noise and exacerbates micropump internal flow complexity.
In summary, for high-revolving helicoidal pump, design optimization is a kind of efficiently, internal flow vortex core low intensity, spiral
Blade pressure surface barometric gradient is small and the small microminiature spiral blood pump of tip clearance vortex structural strength is of crucial importance.
The content of the invention
The purpose of this utility model is large scale be present for helicoidal pump wheel nose existing for the helicoidal pump of rotation at a high speed
Vortex core problem and spiral pump blade and transports liquid inlet angle are larger, easily cause local eddy currents and aggravation flowing instability etc. and ask
Topic, there is provided a kind of inner-walls of duct, which has, built-in prewhirls groove and miniature spiral shell that the multistage that there is water conservancy diversion helical blade at impeller inlet end is prewhirled
Revolve pump.
The utility model includes spiral pump sleeve, helical runner, spiral stator and helicoidal pump rotating shaft；Described spiral pump block
Cylinder, helical runner and helicoidal pump rotating shaft are coaxial；Helicoidal pump sleeve lining offers cylindrical screw connected in star, and cylindrical screw shape is recessed
Groove, helical runner and helicoidal pump rotating shaft are arranged successively along spiral pump sleeve entrance point to extreme direction is exported；The wheel hub of helical runner
Two panels spiral stator is set close to cylindrical screw connected in star one end, the wheel hub other end is fixed with helicoidal pump rotating shaft.
Described helical runner is provided with two panels cylindrical helical blade；The bifilar helix that two panels cylindrical helical blade is formed
Pitch H1For the 0.2~0.3 of helicoidal pump sleeve diameter, the spacing L of cylindrical screw connected in star and helical runner0=H1；Cylindrical screw
The bifilar helix pitch of connected in star is H2, H2Value is 1.2H1~1.5H1；Two helix number of turns phases of cylindrical screw connected in star
Deng；Two helix starting points of cylindrical screw connected in star differ 180 ° in spiral pump sleeve circumference, in helicoidal pump sleeve axial direction
Upper position is identical.The section of cylindrical screw connected in star is inverted isosceles trapezoid.
The rotation direction all same of described cylindrical screw connected in star and cylindrical helical blade and spiral stator；Spiral stator
The helix starting point of helix terminal and cylindrical helical blade on helical runner axial direction apart from value be 0.2~0.3H1。
The helix starting point of two panels spiral stator differs 180 ° in helical runner circumference, and the helix of two panels cylindrical helical blade rises
Point also differs 180 ° in helical runner circumference；The helix number of turns of two panels cylindrical helical blade is equal；Two panels spiral stator
Helix starting point line be located at the helix starting point line of two panels cylindrical helical blade along cylindrical helical blade screw line
Rotation direction reversely deflects θ angular positions, θ=30 °.
The helix of the spiral stator is conical spiral, and the conical spiral cone angle of two panels spiral stator is equal, spiral shell
The conical spiral cone angle of rotation stator takes 60 °~70 °；The helix number of turns of two panels spiral stator is equal, two panels spiral stator shape
Into bifilar helix pitch value be 0.5~0.7H1, the leading edge of spiral stator and the hub side plane tangent of helical runner.
Projection is provided with the pressure face leaf top of the spiral stator；Raised peak and spiral stator pressure face it is vertical away from
It is 0.3D from value1~0.5D1, D1For stator thickness；On each cross section of spiral stator, radially, raised peak to spiral shell
Revolve the distance L of vane root4For the leaf heights of roofs L of spiral stator390%~95%；The helix destination county of spiral stator
L3For the 5%~10% of the helix starting point leaf heights of roofs of cylindrical helical blade；Raised both sides and spiral stator pressure face
Between smoothly transitted by arc surface.
Described helicoidal pump rotating shaft is driven by motor.
Two helix number of turns of the cylindrical screw connected in star are 2~4 circles；The spiral winding of cylindrical helical blade
Number is 1~4 circle；The helix number of turns of spiral stator is 1~4 circle.
The height of the isosceles trapezoid is the 0.03~0.05 of helicoidal pump sleeve diameter, trapezoidal bottom and the angle value of waist
For 50 °~60 °.
The beneficial effects of the utility model：
The utility model sets cylindrical screw connected in star by the entrance point in spiral pump sleeve, in spiral pump sleeve
The blood of wall can flow along cylindrical screw connected in star so that transport blood and formed and be adjacent to before cylindrical helical blade is entered
The motion of helicoidal pump sleeve lining is prewhirled.Helical blade is located at spiral pump sleeve entrance point near axis caused by rotating at a high speed
The compact district of vorticity is inevitable, and the motion for being adjacent to helicoidal pump sleeve lining of cylindrical screw connected in star initiation is prewhirled can
Alleviate the strength of vortex of spiral pump sleeve entrance point so that it is strong that spiral pump sleeve entrance point inwall has more uniform vortex
Degree, the strength of vortex in spiral pump sleeve entrance point is reduced on the whole, improve conveying fluid (blood) transports situation.
The utility model sets the cylindrical helical blade of spiral stator, spiral stator and helical runner at impeller inlet end
Helix pitch it is different, the section of spiral stator can be directed to have the projection that arc surface smoothly transits at pressure face leaf top
The helical runner of rotation plays drainage guide functions at a high speed, for helical runner, especially close to spiral pump sleeve entrance point
Larger barometric gradient on cylindrical helical blade pressure surface be present, the leading edge of cylindrical helical blade also has microvortex stream
Phenomenon, impact of the fluid to cylindrical helical blade of rotation at a high speed can be weakened, reduce cylindrical helical blade pressure surface
Barometric gradient；Projection on spiral stator makes the fluid on spiral stator more flow to the blade root of cylindrical helical blade
Place, by the traffic organising for the end fluid that become a mandarin to cylindrical helical blade, the circle close to spiral pump sleeve entrance point can be weakened
The flowing instability situation of cylindrical coil blade and blade top gap location, for cylindrical helical blade inlet edge and cylindrical helical blade
The vortex in gap plays abated effect, while can also weaken impeller and become a mandarin end and the cylinder close to spiral pump sleeve entrance point
Eddy current crack at helical blade blade tip clearance.
Brief description of the drawings
Fig. 1 is partial cross-sectional perspective view of the present utility model；
Fig. 2 is half-section diagram of the present utility model；
Fig. 3 is the structural perspective of helical runner of the present utility model and spiral stator；
Fig. 4 is the cylindrical helical blade of helical runner of the present utility model and the schematic view of the mounting position of spiral stator；
Fig. 5 is the conical spiral schematic diagram of spiral stator in the utility model；
Fig. 6 is spiral stator schematic cross-section of the present utility model.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the utility model is described in further detail.
Mentality of designing：For high-revolving helicoidal pump, want design optimization and go out a kind of efficient, internal flow vortex core intensity
The microminiature spiral blood pump low, helical blade pressure face barometric gradient is small and tip clearance vortex structural strength is small, seeks to weak
Change the vortex core structure that the helical blade of rotation at a high speed is formed, especially weaken the vortex core intensity of quick runner import front end, and pin
Big to helical blade pressure face barometric gradient, blade tip clearance has that large-sized vortex structure optimizes to helicoidal pump.
As shown in figure 1, the Mini-type spiral pump that a kind of multistage is prewhirled, including spiral pump sleeve 1, helical runner 3, spiral stator
4 and helicoidal pump rotating shaft 5；Spiral pump sleeve 1, helical runner 3 and helicoidal pump rotating shaft 5 are coaxial；The inwall of spiral pump sleeve 1 offers circle
Post spiral groove 2, cylindrical screw connected in star 2, helical runner 3 and helicoidal pump rotating shaft 5 extremely export along the entrance point of spiral pump sleeve 1
Extreme direction is arranged successively；The wheel hub of helical runner 3 sets two panels spiral stator 4 close to the one end of cylindrical screw connected in star 2, and wheel hub is another
One end is fixed with helicoidal pump rotating shaft 5.Helicoidal pump rotating shaft 5 is driven by motor, so as to drive helical runner high-speed rotation.
As shown in Fig. 2,3 and 4, if the width of helical runner 3 is L1, helical runner is provided with two panels cylindrical helical blade；Two
The bifilar helix pitch H that piece cylindrical helical blade is formed1For the internal diameter D of spiral pump sleeve 100.2~0.3, cylindrical screw shape is recessed
The spacing L of groove 2 and helical runner 30=H1；The bifilar helix pitch of cylindrical screw connected in star is H2, H2Value is 1.2H1~
1.5H1；Two helix number of turns of cylindrical screw connected in star are equal, are 2~4 circles；Two spirals of cylindrical screw connected in star
Line starting point differs 180 ° in the circumference of spiral pump sleeve 1, and position is identical on the axial direction of spiral pump sleeve 1.Cylindrical screw connected in star
Section be inverted isosceles trapezoid, the height of isosceles trapezoid is the internal diameter D of spiral pump sleeve 100.03~0.05, trapezoidal bottom
Angle value with waist is 50 °~60 °.
The rotation direction all same of cylindrical screw connected in star and cylindrical helical blade and spiral stator 4；The spiral of spiral stator 4
Distance L of the helix starting point of line terminal and cylindrical helical blade on helical runner axial direction2Value is 0.2~0.3H1.Two
The helix starting point of piece spiral stator differs 180 ° in helical runner circumference, the helix starting point of two panels cylindrical helical blade
180 ° are also differed in helical runner circumference；The helix number of turns of two panels cylindrical helical blade is equal, is 1~4 circle；Two panels
The helix starting point line of spiral stator 4 is located at the helix starting point line of two panels cylindrical helical blade along cylindrical helical leaf
Piece helix rotation direction reversely deflects θ angular positions, θ=30 °.
As shown in Fig. 3,4 and 5, the helix of spiral stator is conical spiral, the conical spiral of two panels spiral stator
Cone angle is equal, and cone angle chooses, in the utility model the conical spiral cone angle Φ of spiral stator relevant with wheel hub head shape
Take 60 °~70 °；The helix number of turns of two panels spiral stator is equal, be 1~4 circle, two panels spiral stator formed bifilar helix
Pitch H3Value is 0.5~0.7H1, the leading edge of spiral stator and the hub side plane tangent of helical runner 3.
As shown in fig. 6, being provided with projection at the pressure face leaf top of spiral stator, the helical runner that can be directed to rotation at a high speed rises
To drainage guide functions.The vertical range D of raised peak and spiral stator pressure face2Value is 0.3D1~0.5D1, D1To lead
Leaf thickness；On each cross section of spiral stator, radially, the distance L of raised peak to spiral vane root4Led for spiral
The leaf heights of roofs L of leaf390%~95%, it is seen then that L4It is with L3Change and change；The helix destination county of spiral stator
L3For the 5%~10% of the helix starting point leaf heights of roofs of cylindrical helical blade；Raised both sides and spiral stator pressure face
Between smoothly transitted by arc surface.
The workflow for the Mini-type spiral pump that the multistage is prewhirled is as follows：
Helicoidal pump rotating shaft 5 is driven by motor, so as to drive helical runner to rotate.Fluid is entered by the entrance point of spiral pump sleeve
Enter, during by the cylindrical screw connected in star of helicoidal pump sleeve lining, the fluid close to helicoidal pump sleeve lining can be along cylinder spiral shell
Revolve connected in star flowing so that the motion that fluid formation before cylindrical helical blade is entered is adjacent to helicoidal pump sleeve lining is pre-
Rotation, so as to reduce the strength of vortex at spiral pump sleeve entrance point axis so that at spiral pump sleeve entrance point inwall and axis
The strength of vortex at place becomes uniform.Fluid through the pre- supination of cylindrical screw connected in star enters spiral stator, due to spiral stator and spiral shell
The helix pitch of the cylindrical helical blade of propeller runner is unequal, and has arc surface smooth at the pressure face leaf top of spiral stator
The projection of transition, drainage guide functions can be played to helical runner, weakens impact of the fluid to cylindrical helical blade, reduces cylinder
The barometric gradient of shape helical blade pressure face, weaken the microvortex flow phenomenon of cylindrical helical blade inlet edge；And spiral stator
On projection make at the blade root of fluid guide cylinder shape helical blade on spiral stator, by being become a mandarin to cylindrical helical blade
The traffic organising of fluid is held, weakens the flowing shakiness close to the cylindrical helical blade and blade top gap location of spiral pump sleeve entrance point
Determine situation, abated effect is played to the vortex of cylindrical helical blade inlet edge and cylindrical helical impeller clearance, and then weaken leaf
Take turns the eddy current crack at become a mandarin end and the cylindrical helical blade and blade top gap location close to spiral pump sleeve entrance point.
Claims (4)
1. the Mini-type spiral pump that a kind of multistage is prewhirled, including spiral pump sleeve, helical runner and helicoidal pump rotating shaft, its feature exist
In：Also include spiral stator；Described spiral pump sleeve, helical runner and helicoidal pump rotating shaft are coaxial；Helicoidal pump sleeve lining is opened
Provided with cylindrical screw connected in star, cylindrical screw connected in star, helical runner and helicoidal pump rotating shaft are along spiral pump sleeve entrance point to going out
Mouth extreme direction is arranged successively；The wheel hub of helical runner is another close to cylindrical screw connected in star one end setting two panels spiral stator, wheel hub
One end is fixed with helicoidal pump rotating shaft；
Described helical runner is provided with two panels cylindrical helical blade；The bifilar helix pitch that two panels cylindrical helical blade is formed
H1For the 0.2~0.3 of helicoidal pump sleeve diameter, the spacing L of cylindrical screw connected in star and helical runner0=H1；Cylindrical screw shape is recessed
The bifilar helix pitch of groove is H2, H2Value is 1.2H1~1.5H1；Two helix number of turns of cylindrical screw connected in star are equal；
Two helix starting points of cylindrical screw connected in star differ 180 ° in spiral pump sleeve circumference, in helicoidal pump quill to upper
Put identical；The section of cylindrical screw connected in star is inverted isosceles trapezoid；
The rotation direction all same of described cylindrical screw connected in star and cylindrical helical blade and spiral stator；The spiral of spiral stator
The helix starting point of line terminal and cylindrical helical blade on helical runner axial direction apart from value be 0.2~0.3H1；Two panels
The helix starting point of spiral stator differs 180 ° in helical runner circumference, and the helix starting point of two panels cylindrical helical blade exists
Also 180 ° are differed in helical runner circumference；The helix number of turns of two panels cylindrical helical blade is equal；The spiral shell of two panels spiral stator
Spin line starting point line is located at the helix starting point line of two panels cylindrical helical blade along cylindrical helical blade screw line rotation direction
Reversely deflection θ angular positions, θ=30 °；
The helix of the spiral stator is conical spiral, and the conical spiral cone angle of two panels spiral stator is equal, and spiral is led
The conical spiral cone angle of leaf takes 60 °~70 °；The helix number of turns of two panels spiral stator is equal, what two panels spiral stator was formed
Bifilar helix pitch value is 0.5~0.7H1, the leading edge of spiral stator and the hub side plane tangent of helical runner；
Projection is provided with the pressure face leaf top of the spiral stator；The vertical range of raised peak and spiral stator pressure face takes
It is worth for 0.3D1~0.5D1, D1For stator thickness；On each cross section of spiral stator, radially, raised peak to spiral is led
The distance L of leaf blade root4For the leaf heights of roofs L of spiral stator390%~95%；The L of the helix destination county of spiral stator3For
The 5%~10% of the helix starting point leaf heights of roofs of cylindrical helical blade；Between raised both sides and spiral stator pressure face
Smoothly transitted by arc surface.
2. the Mini-type spiral pump that a kind of multistage according to claim 1 is prewhirled, it is characterised in that：Described helicoidal pump rotating shaft
Driven by motor.
3. the Mini-type spiral pump that a kind of multistage according to claim 1 is prewhirled, it is characterised in that：The cylindrical screw shape is recessed
Two helix number of turns of groove are 2~4 circles；The helix number of turns of cylindrical helical blade is 1~4 circle；The spiral shell of spiral stator
The spin line number of turns is 1~4 circle.
4. the Mini-type spiral pump that a kind of multistage according to claim 1 is prewhirled, it is characterised in that：The height of the isosceles trapezoid
Spend for the 0.03~0.05 of helicoidal pump sleeve diameter, the angle value of trapezoidal bottom and waist is 50 °~60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647757.9U CN207018256U (en) | 2017-06-06 | 2017-06-06 | The Mini-type spiral pump that a kind of multistage is prewhirled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647757.9U CN207018256U (en) | 2017-06-06 | 2017-06-06 | The Mini-type spiral pump that a kind of multistage is prewhirled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207018256U true CN207018256U (en) | 2018-02-16 |
Family
ID=61485030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720647757.9U Expired - Fee Related CN207018256U (en) | 2017-06-06 | 2017-06-06 | The Mini-type spiral pump that a kind of multistage is prewhirled |
Country Status (1)
| Country | Link |
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| CN (1) | CN207018256U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518682A (en) * | 2018-12-21 | 2019-03-26 | 西南交通大学 | Spiral steel pile with logatithmic spiral blade construction |
| CN109595174A (en) * | 2019-01-03 | 2019-04-09 | 石向阳行 | Radial inflow screw fluid pump |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| CN113374613A (en) * | 2021-06-10 | 2021-09-10 | 合肥新沪屏蔽泵有限公司 | Turbine pipeline pump |
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11654275B2 (en) | 2019-07-22 | 2023-05-23 | Shifamed Holdings, Llc | Intravascular blood pumps with struts and methods of use and manufacture |
| US11724089B2 (en) | 2019-09-25 | 2023-08-15 | Shifamed Holdings, Llc | Intravascular blood pump systems and methods of use and control thereof |
| US11964145B2 (en) | 2019-07-12 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
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2017
- 2017-06-06 CN CN201720647757.9U patent/CN207018256U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11185677B2 (en) | 2017-06-07 | 2021-11-30 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US11717670B2 (en) | 2017-06-07 | 2023-08-08 | Shifamed Holdings, LLP | Intravascular fluid movement devices, systems, and methods of use |
| US11511103B2 (en) | 2017-11-13 | 2022-11-29 | Shifamed Holdings, Llc | Intravascular fluid movement devices, systems, and methods of use |
| US10722631B2 (en) | 2018-02-01 | 2020-07-28 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| US11229784B2 (en) | 2018-02-01 | 2022-01-25 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of use and manufacture |
| CN109518682B (en) * | 2018-12-21 | 2023-09-22 | 西南交通大学 | Spiral steel pile with logarithmic spiral vane structure |
| CN109518682A (en) * | 2018-12-21 | 2019-03-26 | 西南交通大学 | Spiral steel pile with logatithmic spiral blade construction |
| CN109595174A (en) * | 2019-01-03 | 2019-04-09 | 石向阳行 | Radial inflow screw fluid pump |
| US11964145B2 (en) | 2019-07-12 | 2024-04-23 | Shifamed Holdings, Llc | Intravascular blood pumps and methods of manufacture and use |
| US11654275B2 (en) | 2019-07-22 | 2023-05-23 | Shifamed Holdings, Llc | Intravascular blood pumps with struts and methods of use and manufacture |
| US11724089B2 (en) | 2019-09-25 | 2023-08-15 | Shifamed Holdings, Llc | Intravascular blood pump systems and methods of use and control thereof |
| CN113374613A (en) * | 2021-06-10 | 2021-09-10 | 合肥新沪屏蔽泵有限公司 | Turbine pipeline pump |
| CN113374613B (en) * | 2021-06-10 | 2024-06-04 | 合肥新沪屏蔽泵有限公司 | Turbine pipeline pump |
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