CN117108513B - Conveying pump for flash spinning and flash spinning system - Google Patents
Conveying pump for flash spinning and flash spinning system Download PDFInfo
- Publication number
- CN117108513B CN117108513B CN202311359855.9A CN202311359855A CN117108513B CN 117108513 B CN117108513 B CN 117108513B CN 202311359855 A CN202311359855 A CN 202311359855A CN 117108513 B CN117108513 B CN 117108513B
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- blade
- impeller
- pump
- flash spinning
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- 238000009987 spinning Methods 0.000 title claims abstract description 68
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000001154 acute effect Effects 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 description 36
- 239000000243 solution Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229920001410 Microfiber Polymers 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000003658 microfiber Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- -1 filaments Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004753 textile 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
- 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
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/11—Flash-spinning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
-
- 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
-
- 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
- F04D29/242—Geometry, shape
-
- 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
-
- 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
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The embodiment of the invention provides a conveying pump for flash spinning and a flash spinning system, which relate to the technical field of flash spinning, wherein a pump shell of the conveying pump for flash spinning is provided with a circulating channel; the rotary shaft is rotatably arranged in the circulation channel, the first sub-blade and the second sub-blade are arc-shaped blades, the arc-shaped length of the first sub-blade is smaller than that of the second sub-blade, the arc-shaped radius of the first sub-blade is smaller than that of the second sub-blade, the end part of the first sub-blade is connected with the middle area of the second sub-blade, and the distance between the first sub-blade and the second sub-blade is gradually increased; the guide vane group is circumferentially arranged on the pump shell around the impeller, the center O1 of the area formed by the guide vane group is not coincident with the center O2 of the area formed by the impeller, the end part of the plurality of guide vanes, which is far away from the impeller, is a far end, and the distances between the far ends of any adjacent guide vanes in the plurality of guide vanes are different; the motor is connected with the impeller in a transmission way through a rotating shaft.
Description
Technical Field
The embodiment of the invention relates to the technical field of flash spinning, in particular to a conveying pump for flash spinning and a flash spinning system.
Background
Flash spinning is a spinning process that uses a high velocity gas stream to spray molten polymer into a cooling chamber, causing it to solidify rapidly and form fibers. The process is generally used for producing filaments or microfibers and has the characteristics of high strength, high surface area, high filtration performance and the like.
The flash spinning has the characteristics of high efficiency, rapidness and flexibility, and can produce high-performance fibers such as filaments, microfibers and the like. It has wide application in textile, filtering, medical and electronic fields.
The flash spinning process comprises the following main steps:
melting a polymer: heating the polymer particles to a molten state is typically accomplished using a heated barrel or extruder.
Spraying: the molten polymer is sprayed through a nozzle into a cooling chamber to form fibers. During spraying, the polymer is typically stretched and cooled using a high velocity gas stream to rapidly solidify.
And (3) collecting: collecting the coagulated fibers is typically accomplished using a collector or winder.
The polymer melt is delivered to the cooling chamber for injection by a pump that provides pressure that enables the polymer melt to flow through the nozzle and form a spin during injection by the nozzle.
The pump can maintain a steady supply of polymer melt by controlling the inlet pressure and flow. A stable flow rate is important because it ensures that the formation of the spun fiber proceeds continuously and a consistent spinning quality is obtained. The pump can also improve the formation and quality of the spinning by controlling the flow rate and spray effect of the solution. The pump can provide uniform flow, so that the spinning sprayed by the nozzle can obtain better extension and directionality, and thus better spinning quality.
In general, pumps play a critical role in the flash spinning process, which can provide a stable solution flow and pressure, thereby ensuring continuous formation of the spinning and high quality production. How to ensure the conveying capacity and stability of the pump will have an important influence on the effect of flash spinning.
Disclosure of Invention
The embodiment of the invention provides a conveying pump for flash spinning and a flash spinning system, which ensure the conveying capacity and stability of the pump so as to improve the spinning quality.
In a first aspect, a delivery pump for flash spinning according to an embodiment of the present invention includes:
a pump housing having a flow passage;
the impeller is rotatably arranged in the circulation channel through a rotating shaft, the impeller comprises a plurality of blades, the blades comprise a first sub-blade and a second sub-blade, the first sub-blade and the second sub-blade are arc-shaped blades, the arc length of the first sub-blade is smaller than that of the second sub-blade, the arc radius of the first sub-blade is smaller than that of the second sub-blade, the end part of the first sub-blade is connected with the middle area of the second sub-blade, the first sub-blade points to the periphery along the axial direction of the rotating shaft, and the distance between the first sub-blade and the second sub-blade is gradually increased;
the guide vane group is circumferentially arranged on the pump shell around the impeller, the center O1 of the area formed by the guide vane group is not overlapped with the center O2 of the area formed by the impeller, the distance between the center O1 of the area formed by the guide vane group and the center O2 of the area formed by the impeller in the X direction is D1, the distance between the center O1 of the area formed by the guide vane group and the center O2 of the area formed by the impeller in the Y direction is D2, D1=tD2, and t ranges from 1.1 to 1.3; the guide vane group comprises a plurality of guide vanes, the end part of each guide vane, which is far away from the impeller, is a far end, and the distances between the far ends of any adjacent guide vanes in the plurality of guide vanes are different;
and the motor is arranged outside the pump shell and is in transmission connection with the impeller through a rotating shaft.
Through installing impeller and stator group in the circulation passageway in the pump case, realize the transportation to polymer melting, concrete impeller installs on the pump case through the pivot, the impeller can be rotated for the pump case around the pivot, the impeller rotates the process with polymer melting acceleration and transfer, utilize the rotation of impeller to draw in the polymer melting from the import of pump case, and the export of polymer melting propelling movement to the pump case is carried out through the power of impeller, the impeller includes a plurality of blades, first rotor blade and second rotor blade are arc blade, the arc length of first rotor blade is less than the arc length of second rotor blade, the arc radius of first rotor blade is less than the arc radius of second rotor blade, the tip and the intermediate zone of second rotor blade of first rotor blade are connected, and point to the periphery along the axis direction of pivot, the distance between first rotor blade and the second rotor blade increases gradually, the blade shape of design like this, performance and efficiency of pump can be improved by a wide margin. The blades formed by the first cotyledon and the second cotyledon with two different shapes can be used for adapting to the melt flow requirements of polymers with different densities. The precisely designed and optimized impeller can improve pump efficiency, reduce noise, and reduce vibration. Since the polymer melt is particularly sensitive to pressure, that is, the pressure of the pump in the polymer melt conveying process influences the spinning quality, the pressure generated in the blade rotating process influences the final spinning quality of the polymer melt, so that in order to relieve the pressure problem, a guide vane group is adopted to play a role in guiding the polymer melt flow, in particular, the guide vane group is arranged on a pump shell around the periphery of an impeller, the guide vane group is arranged eccentrically relative to the impeller, the guide vane guides the polymer melt to the impeller, and since the speed and the direction of each position are different in the polymer melt flow process, the distance between the distal ends of any adjacent guide vanes in a plurality of guide vanes is different for facilitating the guiding to change the flow speed and the direction of the polymer melt; therefore, the resistance loss in the medium flowing process can be reduced, so that the medium can enter the impeller more smoothly, and the efficiency of the pump is improved; the vanes may accelerate the velocity of the media flow so that the polymer melt can enter the impeller faster and provide more power. The flow state of polymer melting can be improved, turbulence and vortex are reduced, and the stability and flow velocity uniformity of fluid are improved. The guide vane group and the blades are matched to guide and change the flow direction of the medium, so that the speed and the flow state of the medium are improved, and the performance and the efficiency of the pump are further improved.
Optionally, the number of blades is smaller than the number of vanes.
Optionally, the number of the blades is an odd number, and the number of the guide vanes is an even number.
Optionally, the number of the blades is m1, the number of the guide vanes is m2, and m2= (2n+2) m1, n is a positive integer.
Optionally, a center line of the pump shell coincides with a center line of a region area formed by the guide vane group;
the center line of the pump shell is not coincident with the center line of the area formed by the impeller.
Optionally, the thickness of the guide vane gradually increases along the direction in which the center O1 of the area of the region formed by the guide vane group is directed to the outside.
Optionally, the thicknesses of the first and second sub-blades are the same.
Optionally, the first sub-blade and the second sub-blade form an included angle with an opening towards the guide vane group, and the included angle is an acute angle.
In a second aspect, an embodiment of the present invention provides a flash spinning system, including a valve and a delivery pump according to any one of the first aspects;
the delivery pump has an inlet and an outlet, and the valve is disposed at the outlet of the delivery pump for controlling the outlet pressure of the delivery pump.
Optionally, the pump further comprises a flow guiding structure, the flow guiding structure is arranged at the outlet, the flow guiding structure comprises a plurality of flow guiding plates, each of the plurality of flow guiding plates is rotatably arranged on the outer wall of the pump shell, the plurality of flow guiding plates are circumferentially arranged around the outlet, and the flow guiding plates rotate to change the size of the outlet.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the external structure of a transfer pump for flash spinning according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a transfer pump for flash spinning according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an impeller according to an embodiment of the present invention;
FIG. 4 is a schematic view of a vane set according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a flash spinning system according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a flow guiding structure according to an embodiment of the present invention;
FIG. 7 is a second schematic diagram of a flow guiding structure according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a baffle according to an embodiment of the present invention.
Reference numerals:
1-a pump shell; 11-outlet; 2-an impeller; 21-leaf; 211-first sub-leaf; 212-a second sub-leaf; 3-rotating shaft; 4-a guide vane group; 41-guide vanes; 411-distal; l-distance between the first sub-blade and the second sub-blade S1-thickness of the guide vane; s2, the thickness of the first sub-blade; s3, the thickness of the second sub-blade; alpha-angle; 5-valve; 6-a flow guiding structure; 61-a deflector; 611-body; 612-connectors.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
For ease of understanding, polymer melt refers to the spinning solution.
As shown in fig. 1 and fig. 2, in a first aspect, a transfer pump for flash spinning according to an embodiment of the present invention includes:
a pump housing 1, the pump housing 1 having a flow passage;
the impeller 2 is rotatably arranged in the circulation channel through the rotating shaft 3, the impeller 2 comprises a plurality of blades 21, each blade 21 comprises a first sub-blade 211 and a second sub-blade 212, each first sub-blade 211 and each second sub-blade 212 are arc-shaped blades 21, the arc-shaped length of each first sub-blade 211 is smaller than that of each second sub-blade 212, the arc-shaped radius of each first sub-blade 211 is smaller than that of each second sub-blade 212, the end part of each first sub-blade 211 is connected with the middle area of each second sub-blade 212, the blades are directed to the periphery along the axial direction of the rotating shaft 3, and the distance between each first sub-blade 211 and each second sub-blade 212 is gradually increased;
the guide vane group 4 is circumferentially arranged on the pump shell 1 around the impeller 2, the center O1 of the area formed by the guide vane group 4 is not overlapped with the center O2 of the area formed by the impeller 2, the distance between the center O1 of the area formed by the guide vane group 4 and the center O2 of the area formed by the impeller 2 in the X direction is D1, the distance between the center O1 of the area formed by the guide vane group 4 and the center O2 of the area formed by the impeller 2 in the Y direction is D2, D1=tD2, and t is in the range of 1.1-1.3; the guide vane group 4 comprises a plurality of guide vanes 41, the ends of the guide vanes 41 far away from the impeller 2 are distal ends 411, and the distances between the distal ends 411 of any adjacent guide vanes 41 in the plurality of guide vanes 41 are different;
and the motor is arranged outside the pump shell 1 and is in transmission connection with the impeller 2 through the rotating shaft 3.
It should be noted that, by installing the impeller 2 and the vane group 4 in the circulation channel in the pump casing 1, the polymer melt is conveyed, the impeller 2 is specifically installed on the pump casing 1 through the rotating shaft 3, the impeller 2 can rotate relative to the pump casing 1 around the rotating shaft 3, the polymer melt is accelerated and transferred in the rotation process of the impeller 2, the polymer melt is pumped from the inlet of the pump casing 1 by the rotation of the impeller 2, and is pushed to the outlet 11 of the pump casing 1 by the power of the impeller 2, the impeller 2 comprises a plurality of blades 21, the first sub-blade 211 and the second sub-blade 212 are both arc-shaped blades 21, the arc-shaped length of the first sub-blade 211 is smaller than the arc-shaped length of the second sub-blade 212, the arc-shaped radius of the first sub-blade 211 is smaller than the arc-shaped radius of the second sub-blade 212, the end of the first sub-blade 211 is connected with the middle area of the second sub-blade 212, and the distance between the first sub-blade 211 and the second sub-blade 212 is gradually increased along the axis direction of the rotating shaft 3 to the periphery, so designed blade 21 shape can greatly improve the performance and efficiency of the pump. The blade 21 of two differently shaped first 211 and second 212 sub-blades may be used to accommodate polymer melt flow requirements of different densities. The precisely designed and optimized impeller 2 can improve pump efficiency, reduce noise and reduce vibration. Since the polymer melt is particularly sensitive to pressure, that is, the pressure of the pump during the polymer melt conveying process affects the spinning quality, the pressure generated during the rotation of the blades 21 affects the final spinning quality of the polymer melt, so that in order to relieve the pressure problem, the guide vane group 4 is adopted to guide the polymer melt flow, in particular, the guide vane group 4 is circumferentially arranged on the pump shell 1 around the impeller 2, the guide vane group 4 is eccentrically arranged relative to the impeller 2, the guide vanes 41 guide the polymer melt to the impeller 2, and the speed and the direction of each position are different during the polymer melt flow process, so that the distance between the distal ends 411 of any adjacent guide vanes 41 in the plurality of guide vanes 41 is different for convenience in guiding to change the flow speed and the direction of the polymer melt; therefore, the resistance loss in the medium flowing process can be reduced, so that the medium can enter the impeller 2 more smoothly, and the efficiency of the pump is improved; the vanes 41 may accelerate the velocity of the medium flow so that the polymer melt can enter the impeller 2 faster and provide more power. The flow state of polymer melting can be improved, turbulence and vortex are reduced, and the stability and flow velocity uniformity of fluid are improved. The guide vane group 4 and the blades 21 are matched to guide and change the flow direction of the medium, so that the speed and the flow state of the medium are improved, and the performance and the efficiency of the pump are further improved.
With continued reference to fig. 2, the center O1 of the area formed by the guide vane group 4 does not coincide with the center O2 of the area formed by the impeller 2, the distance between the center O1 of the area formed by the guide vane group 4 and the center O2 of the area formed by the impeller 2 in the X direction is D1, the distance between the center O1 of the area formed by the guide vane group 4 and the center O2 of the area formed by the impeller 2 in the Y direction is D2, d1=td2, t ranges from 1.1 to 1.3, for example, t may be 1.1, 1.2 or 1.3.
It can be ascertained from fig. 2 that the impeller 2 is arranged eccentrically with respect to the guide vane group 4, i.e. that the impeller 2 is located close to the upper left with respect to the guide vane group 4.
In some particular embodiments, the number of blades 21 is less than the number of vanes 41. For example, the number of the blades 21 may be 3, or the number of the blades 21 is 5, or the number of the blades 21 is 7, and the blades 21 rotate to convey the spinning solution, so that the spinning quality is affected due to the fact that the spinning solution is particularly sensitive to the pressure, that is, the pump is sensitive to the pressure in the conveying process of the spinning solution, the number of the blades 21 is related to the pressure, and the more the number of the blades 21, the greater the pressure, the more the number of the blades 21, the limit on the number of the blades 21 is provided.
Specifically, the number of blades 21 is an odd number, and the number of vanes 41 is an even number. That is, the number of blades 21 is m1, the number of vanes 41 is m2, m2= (2n+2) m1, and n is a positive integer. For example, the number of blades 21 may be 3, and the number of vanes 41 8; or the number of blades 21 is 5, and the number of guide vanes 41 is 12. Since the guide vane 41 guides the spinning solution to the position of the blade 21, the guide vane 41 and the blade 21 are matched, and the number ratio of the guide vane 41 to the blade 21 improves the performance of the delivery pump for flash spinning.
With continued reference to FIG. 1, the centerline of the pump casing 1 coincides with the centerline of the area of the region formed by the vane set 4; the center line of the pump casing 1 is not coincident with the center line of the area of the region where the impeller 2 is formed. Because the speeds of the spinning solutions led out from the guide vane group 4 are different, the position where the spinning solution flows out is close to the blade 21, and the position where the spinning solution flows out is far away from the blade 21, so that the stability of the flowing of the spinning solution is guaranteed, and the vibration of the conveying pump for flash spinning provided by the embodiment of the invention is effectively avoided.
As shown in fig. 3, the thicknesses of the first sub-blade 211 and the second sub-blade 212 are the same, that is, the thickness S2 of the first sub-blade 211 and the thickness S3 of the second sub-blade 212 are the same, so that the strength of the blade 21 is the same in the rotation process of the blade 21, and the problem that the rotation speed of the spinning solution is uneven due to uneven local stress is avoided, thereby causing vortex or turbulence of the spinning solution and further affecting the final spinning effect.
With continued reference to fig. 3, the first sub-blade 211 and the second sub-blade 212 form an angle α that opens towards the vane group 4, the angle α being an acute angle; for example, α may be 15 °, 20 °, 25 °, or 30 °. In addition, the distance L between the first and second sub-blades 211 and 212 is also varied, and the region between the first and second sub-blades 211 and 212 may be filled with the spinning solution during the rotation of the blade 21, thereby improving the utilization rate of the blade 21.
As shown in fig. 4, the thickness S1 of the guide vane 41 gradually increases in the outward direction along the center O1 of the area of the region formed by the guide vane group 4. Since the speed is high just when the spinning solution enters the guide vane 41, the thickness S1 of the guide vane 41 becomes gradually large from the center toward the outside direction in order to ensure the rigidity of the guide vane 41 and the directionality of the flow of the spinning solution.
In a second aspect, as shown in fig. 5, an embodiment of the present invention provides a flash spinning system, including a valve 5 and a delivery pump according to any one of the first aspects; the transfer pump has an inlet and an outlet 11, and the valve 5 is arranged at the outlet 11 of the transfer pump for controlling the outlet 11 pressure of the transfer pump. The valve 5 at the outlet 11 can be used to control the outlet 11 pressure of the delivery pump, maintaining a constant pressure level. In the flash spinning process, the proper pressure of the outlet 11 can improve the spinning effect and ensure the quality and uniformity of spinning.
As shown in fig. 6-8, the air guiding structure 6 is further included, the air guiding structure 6 is disposed at the outlet 11, the air guiding structure 6 includes a plurality of air guiding plates 61, each air guiding plate 61 of the plurality of air guiding plates 61 is rotatably disposed on an outer wall of the pump casing 1, and the plurality of air guiding plates 61 are circumferentially arranged around the outlet 11, and the air guiding plates 61 are rotated to change the size of the outlet 11.
The specific baffle 61 includes a body 611 and a connecting piece 612, the connecting piece 612 has a through hole, the body 611 is rotatably installed on the outer wall of the outlet 11 through the through hole of a connecting shaft such as a bolt, and of course, in order to realize the rotation of the body 611, a driving piece such as a motor may be provided to realize the adjustment of the body 611, and the rotation of the body 611 realizes the adjustment of the opening area of the outlet 11, thereby realizing the control of the spinning solution flow. Of course, the number of the baffle plates 61 may be two, three or four, and for convenience of understanding, the number of the baffle plates 61 in fig. 6 is four.
With continued reference to fig. 7, the body 611 of the baffle 61 is curved in shape, i.e., the body 611 of the baffle 61 protrudes toward the center of the outlet.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A transfer pump for flash spinning, comprising:
a pump housing having a flow passage;
the impeller is rotatably arranged in the circulation channel through a rotating shaft, the impeller comprises a plurality of blades, the blades comprise a first sub-blade and a second sub-blade, the first sub-blade and the second sub-blade are arc-shaped blades, the arc length of the first sub-blade is smaller than that of the second sub-blade, the arc radius of the first sub-blade is smaller than that of the second sub-blade, the end part of the first sub-blade is connected with the middle area of the second sub-blade, the first sub-blade points to the periphery along the axial direction of the rotating shaft, and the distance between the first sub-blade and the second sub-blade is gradually increased;
the guide vane group is circumferentially arranged around the impeller, the impeller group is positioned in the pump shell, the center O1 of the area formed by the guide vane group is not overlapped with the center O2 of the area formed by the impeller, the distance between the center O1 of the area formed by the guide vane group and the center O2 of the area formed by the impeller in the X direction is D1, the distance between the center O1 of the area formed by the guide vane group and the center O2 of the area formed by the impeller in the Y direction is D2, D1=tD2, and t is in the range of 1.1-1.3; the guide vane group comprises a plurality of guide vanes, the end part of each guide vane, which is far away from the impeller, is a far end, and the distances between the far ends of any adjacent guide vanes in the plurality of guide vanes are different;
and the motor is arranged outside the pump shell and is in transmission connection with the impeller through a rotating shaft.
2. The transfer pump for flash spinning of claim 1, wherein the number of blades is less than the number of vanes.
3. The transfer pump for flash spinning according to claim 2, wherein the number of blades is an odd number and the number of vanes is an even number.
4. A transfer pump for flash spinning according to claim 3, wherein the number of blades is m1, the number of vanes is m2, and m 2= (2n+2) m1, n is a positive integer.
5. The transfer pump for flash spinning of claim 1, wherein a centerline of the pump housing coincides with a centerline of a region area formed by the vane set;
the center line of the pump shell is not coincident with the center line of the area formed by the impeller.
6. The transfer pump for flash spinning according to claim 1, wherein the thickness of the guide vanes gradually becomes larger along the direction in which the center O1 of the area of the region formed by the guide vane group is directed to the outside.
7. The transfer pump for flash spinning of claim 1, wherein the thickness of the first and second sub-blades are the same.
8. The transfer pump for flash spinning of claim 7, wherein the first sub-vane and the second sub-vane form an angle opening toward the vane set, the angle being an acute angle.
9. A flash spinning system comprising a valve and the transfer pump of any one of claims 1-8;
the delivery pump has an inlet and an outlet, and the valve is disposed at the outlet of the delivery pump for controlling the outlet pressure of the delivery pump.
10. The flash spinning system of claim 9, further comprising a deflector structure disposed at the outlet, the deflector structure comprising a plurality of deflectors, each of the plurality of deflectors rotatably disposed on an outer wall of the pump housing, the plurality of deflectors circumferentially arranged about the outlet, the deflectors rotating to vary the size of the outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311359855.9A CN117108513B (en) | 2023-10-20 | 2023-10-20 | Conveying pump for flash spinning and flash spinning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311359855.9A CN117108513B (en) | 2023-10-20 | 2023-10-20 | Conveying pump for flash spinning and flash spinning system |
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| Publication Number | Publication Date |
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| CN117108513A CN117108513A (en) | 2023-11-24 |
| CN117108513B true CN117108513B (en) | 2024-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311359855.9A Active CN117108513B (en) | 2023-10-20 | 2023-10-20 | Conveying pump for flash spinning and flash spinning system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721853A (en) * | 1952-09-30 | 1955-01-12 | George Rogers | Improvements in or relating to rotating-vane pumps, and like apparatus |
| RU2448279C1 (en) * | 2011-05-26 | 2012-04-20 | Закрытое Акционерное Общество Научно-Производственное Объединение "Тэн" | Radial-flow pump diffuser |
| CN206635302U (en) * | 2017-04-06 | 2017-11-14 | 四川大宇中和农业科技发展有限公司 | A kind of self-priming centrifuge |
| CN111120336A (en) * | 2019-12-06 | 2020-05-08 | 广东沃顿科技有限公司 | Heating pump and washing equipment |
| CN111209637A (en) * | 2020-01-14 | 2020-05-29 | 江苏大学 | Method for calculating fluid excitation force of centrifugal pump impeller under eccentric vortex |
-
2023
- 2023-10-20 CN CN202311359855.9A patent/CN117108513B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB721853A (en) * | 1952-09-30 | 1955-01-12 | George Rogers | Improvements in or relating to rotating-vane pumps, and like apparatus |
| RU2448279C1 (en) * | 2011-05-26 | 2012-04-20 | Закрытое Акционерное Общество Научно-Производственное Объединение "Тэн" | Radial-flow pump diffuser |
| CN206635302U (en) * | 2017-04-06 | 2017-11-14 | 四川大宇中和农业科技发展有限公司 | A kind of self-priming centrifuge |
| CN111120336A (en) * | 2019-12-06 | 2020-05-08 | 广东沃顿科技有限公司 | Heating pump and washing equipment |
| CN111209637A (en) * | 2020-01-14 | 2020-05-29 | 江苏大学 | Method for calculating fluid excitation force of centrifugal pump impeller under eccentric vortex |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117108513A (en) | 2023-11-24 |
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