CN101776087A - Rotation shell pump adopting spiral labyrinth dynamic seal - Google Patents
Rotation shell pump adopting spiral labyrinth dynamic seal Download PDFInfo
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- CN101776087A CN101776087A CN201010017696A CN201010017696A CN101776087A CN 101776087 A CN101776087 A CN 101776087A CN 201010017696 A CN201010017696 A CN 201010017696A CN 201010017696 A CN201010017696 A CN 201010017696A CN 101776087 A CN101776087 A CN 101776087A
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Abstract
The invention adopts a rotation shell pump adopting rectangular or triangular or trapezoidal spiral labyrinth dynamic seal, which is characterized in that: a collecting pipe is positioned in the liquid in a rotation shell; an impeller is positioned in the liquid; the impeller is connected with the rotation shell; the rotation shell is connected with a rotary motor; the collecting pipe is connected with a collecting outlet pipe; a stator is arranged on the collecting outlet pipe; a rotor is arranged on an impeller hub; the rotor is matched with the stator; multi-head spiral thread is formed on the matching surface of the stator and the rotor is provided with a multi-head spiral thread through turning; and the tooth shape of the thread is rectangular or triangular or trapezoidal. The rotation shell pump has the advantages that: the leakage problem of fluid between the rotation shell and an impeller inlet is solved due to high sealing pressure generated by a spiral groove, low power consumption, high adaptability and good sealing effect; gap is reserved between the matching surfaces, and belongs to non-contact seal; the manufacturing process is practicable; the structure is simple; the service life is long; and the frictional resistance is lower so that the efficiency of the rotation shell pump can be effectively improved by at least over 3 percent, maximumly 6 percent according to different pump types.
Description
Technical field
What the present invention relates to is a kind of rotary case pump that adopts rectangle or triangle or the dynamic seal of trapezoid spiral labyrinth on impeller hub, is the low-flow high-lift rotary case pump that adopts rectangular coil labyrinth dynamic seal between a kind of impeller hub and the afflux outer pipe.Belong to the pump technical field.
Background technique
The pump series products mainly contains centrifugal pump, mixed flow pump, axial-flow pump, peripheral pump and reciprocating pump etc. and have type spectrum coverage area comparatively widely, but in small flow, high-lift scope, still do not have comparatively desirable product.The product of using in this field mostly is high speed pump, multistage pump and reciprocating pump greatly, the then bulky heaviness of high speed pump, multistage pump and reciprocating pump, easily damaged parts is many, maintenance expenses is high, workload is big and cost an arm and a leg, the reciprocating pump outlet pressure has pulsation can't satisfy most of industrial needs, centrifugal pump is under small flow, high-lift working condition, efficient is low, power consumption is high, should not promote the use of.And rotary-jet pump impeller and revolve shell (being equivalent to the pump housing) rotation has synchronously successfully avoided accounting for the disc friction of loss large percentage in low specific speed pump, makes its efficient more much higher than the efficient of general low specific-speed centrifugal pump.
Rotary-jet pump is a kind of small flow of function admirable, high-lift low specific-speed centrifugal pump, especially is fit to specific speed and is using below 30.The main working parts of this pump is a rotor and the static header pipe that shell is formed that revolves by impeller and rotation synchronously.The fluid that flows into obtains energy under the impeller action of centrifugal force, make and enter the kinetic energy and the pressure energy that revolve the fluid in the shell and be improved, this fluid is under the drive of rotary shell simultaneously, with revolve shell and rotate synchronously, reach maximum value at the inwall place liquid speed that revolves shell, static header pipe is collected the fluid at this place, and the speed of fluid further is converted into the pressure energy, and pump can produce very high lift thus.
In this working procedure, the fluid that revolves in the shell remains the pressure higher state, and impeller inlet is in low-pressure state under the pumping action of impeller blade.Like this, revolve shell-side fluid and impeller inlet and have bigger pressure reduction.The afflux outer pipe passes impeller hub and impeller inlet on the structure, the afflux outer pipe is static, impeller rotates, and has dynamic and static junction plane like this between afflux outer pipe and the impeller hub, must have the gap to closing face, form flow channels, just have pressure reduction stream under the effect of pressure reduction, pressure reduction stream is that fluid returns impeller inlet by the mode of leaking after impeller obtains energy, belongs to improper and flows, be leakage loss, loss causes the decrease in efficiency of pump.This leakage flow is got back to impeller inlet simultaneously, has changed the normal flowing state of impeller inlet, causes flowing in the impeller worsening, and causes bigger flow losses, and the efficient of pump is further descended.So the leakage flow that stops this place is a key issue.At present, general structural design is by reducing to closing the face path clearance, to reduce leakage rate; Perhaps adopt particular form, by on-line retrieval, " a kind of rotary case pump that on liquid collecting pipe, adopts the maze trough structure " of relevant patent such as patent No. ZL200620074531.6, invented at the rotor inner cap and cooperate the installation place to adopt step type maze trough structure with liquid collecting pipe, can reduce the rotor intracavity liquid and flow to rotor inlet place.These methods are static, are by increasing flow resistance, reaching the purpose that reduces leakage rate in principle.But be subject to processing, the restriction of factor such as assembling, give close the face path clearance can not accomplish very little, thereby, leak and still exist, can not eliminate fully.Have only the mode that adopts dynamic seal, could stop leakage loss fully, thereby further improve the efficient of pump, this also is the main and valid approach that rotary case pump is raised the efficiency.
Summary of the invention
The present invention proposes a kind of rotary case pump that adopts rectangle or triangle or the dynamic seal of trapezoid spiral labyrinth on impeller hub, under the condition that factors such as its purpose is intended to process, assembling allow, eliminate fully and give the leakage loss of closing in the face path clearance, thereby improve the efficient of pump effectively.
Technical solution of the present invention: the rotary case pump of adopting spiral labyrinth dynamic seal, it is characterized in that header pipe is in the liquid that revolves in the shell, impeller is arranged in the liquid, impeller with revolve shell and connect, revolve the shell joint electric rotating machine, header pipe is connected with the afflux outer pipe, on the afflux outer pipe, stator is housed, on impeller hub, be assembled with rotor, rotor matches with stator, turning multi-head spiral screw thread on the fitting surface of rotor and stator, the profile of tooth of this screw thread is rectangle or triangle or trapezoidal, the liquid that enters from pump inlet is under the effect of impeller, the liquid that obtains energy enters and revolves in the shell, the liquid that revolves in the shell is revolving under shell 1 drive, with revolve shell and rotate synchronously, liquid has higher kinetic energy and pressure energy, the liquid of impeller inlet is under the pumping action of impeller, pressure is lower, in revolving shell, form pressure reduction between liquid and the impeller inlet, under the effect of this pressure reduction, drive the rotor rotation by impeller, rotor sense of rotation and self rectangle or triangle or trapezoidal thread spiral shell are on the contrary, in the rotor rotation process, epitrochanterian rectangle or triangle or trapezoid spiral groove apply active force to the liquid in the groove: promoting the liquid overcome friction makes circular movement on the one hand, also promoting liquid on the other hand advances vertically, on the liquid of the frictional force action that liquid is produced by viscosity in groove, make it to produce axial back-pressure, rotor and stator have just formed the pumping pressure of rectangle or triangle or trapezoid spiral labyrinth body to thrust to the line shaft of liquid, owing to revolve the pressure that the interior fluid pressure of shell is higher than impeller inlet, under the effect of pressure reduction, spiral chute Clearance Flow along rotor and stator composition, formation pressure reduction stream, the pump flow that produces when rectangle or triangle or trapezoid spiral labyrinth body has stoped the leakage of fluid greater than by the time when pressure reduction flows; The square threaded form parameter-definition is: a=1～3.5mm, b=1.5～5.5mm, h=1.5～4.5mm, z=15～40, α=60 °～85 °, c=0.08～0.8mm; The V thread screw parameter-definition is: a=0.35～1.5mm, b=1.5～5.0mm, h=2.0～7.5mm, z=15～40, α=65 °～85 °, θ=25 °～50 °, c=0.08～0.8mm; The trapezoidal thread parameter-definition is: a=0.35～1.5mm, b=1.5～5.0mm, h=1.5～4.5mm, z=15～40, α=55 °～85 °, θ=15 °～45 °, c=0.08～0.8mm; A in the formula represents that the spiral shell rib is wide, and b represents that screw channel is wide, and h represents groove depth, and z represents number of starts, and α represents the thread helix lift angle, and c represents the one-sided gap of fitting surface between stator and the rotor, and θ represents isosceles trapezoid thread tooth angle.
Advantage of the present invention: at impeller inlet and revolve and adopt rectangle, triangle or the dynamic seal of trapezoid spiral labyrinth between the shell, the sealing load that is produced is big, and consumed power is little, and adaptability is strong, good sealing effect has solved the leakage problem that revolves fluid between shell and the impeller inlet.Dynamic seal is to realize by the forward and reverse screw of bull of turning on rotor, the stator fitting surface, gapped between the fitting surface, belong to untouchable sealing, thereby manufacturing process is feasible, simple in structure, long service life, and have less surface friction drag, can improve the efficient of rotary case pump effectively.According to pump type difference, can raise the efficiency more than 3% at least, be up to 6%, research energy-saving and high efficient rotary case pump there is significance.
Description of drawings
Accompanying drawing 1 is a generalized section of the present utility model.
Accompanying drawing 2 is A enlarged views among Fig. 1.Accompanying drawing 3 is rectangular coil labyrinth body structure schematic representation.
Accompanying drawing 4 is square threaded form geometric parameter figure.
Accompanying drawing 5 is triangle spiral labyrinth body structure schematic representation.
Accompanying drawing 6 is V thread screw geometric parameter figure.
Accompanying drawing 7 is trapezoid spiral labyrinth body structure schematic representation.
Accompanying drawing 8 is trapezoidal thread geometric parameter figure.
1 is to revolve shell, the 2nd among Fig. 1, and header pipe, the 3rd revolves the liquid, the 4th in the shell, impeller, the 5th, impeller inlet, the 6th, afflux outer pipe, the 7th, pump inlet, the 8th, rotor, the 9th, stator, the 10th, the gap between rotor and the stator.
Embodiment
The contrast accompanying drawing, its structure is that header pipe 2 is in the liquid 3 that revolves in the shell 1, impeller 4 is arranged in the liquid 3, impeller 4 with revolve shell 1 and connect, revolve shell 1 and connect electric rotating machine, header pipe 2 is connected with afflux outer pipe 6, stator 9 is housed on afflux outer pipe 6, is assembled with rotor 8 on impeller 4 wheel hubs, rotor 8 matches with stator 9, on the fitting surface of rotor 8 and stator 9 turning the multi-head spiral screw thread, the profile of tooth of screw thread is rectangle (as Fig. 4) or triangle (as Fig. 8) or trapezoidal (as Figure 12).
During work, the liquid 3 that enters from pump inlet 7 is under the effect of impeller 4, and the liquid 3 that obtains energy enters and revolves in the shell 1, and the liquid 3 that revolves in the shell 1 is revolving under shell 1 drives, and revolves shell 1 and rotates synchronously, and at this moment, liquid 3 has higher kinetic energy and pressure energy.The liquid of impeller inlet 5 is under the pumping action of impeller 4, and pressure is lower, like this, forms pressure reduction between liquid 3 and the impeller inlet 5 in revolving shell 1, under the effect of this pressure reduction, will produce leakage flow by gap 10.In order to stop rectangle or triangle or trapezoid spiral screw thread, drive rotor 8 rotations by impeller 4, rotor 8 sense of rotation and self rectangle or triangle or trapezoidal thread spiral shell are on the contrary, like this in rotor 8 rotary courses, rectangle on the rotor 8 or triangle or trapezoid spiral groove apply active force to the liquid in the groove: promoting the liquid overcome friction makes circular movement on the one hand, also promoting liquid on the other hand advances vertically, like this on the liquid of frictional force action in groove that liquid is produced by viscosity, make it to produce axial back-pressure, the line shaft of rotor 8 and 9 pairs of liquid of stator has just formed the pumping pressure of rectangle or triangle or trapezoid spiral labyrinth body to thrust, certainly, owing to revolve the pressure that interior liquid 3 pressure of shell are higher than impeller inlet 5, under the effect of pressure reduction, spiral chute Clearance Flow along rotor and stator composition, formation pressure reduction stream, the pump flow that produces when rectangle or triangle or trapezoid spiral labyrinth body just can stop the leakage of fluid effectively greater than by the time when pressure reduction flows.
The square threaded form parameter-definition is: a=1～3.5mm, b=1.5～5.5mm, h=1.5～4.5mm, z=15～40, α=60 °～85 °, c=0.08～0.8mm; The V thread screw parameter-definition is: a=0.35～1.5mm, b=1.5～5.0mm, h=2.0～7.5mm, z=15～40, α=65 °～85 °, θ=25 °～50 °, c=0.08～0.8mm; The trapezoidal thread parameter-definition is: a=0.35～1.5mm, b=1.5～5.0mm, h=1.5～4.5mm, z=15～40, α=55 °～85 °, θ=15 °～45 °, c=0.08～0.8mm; A in the formula represents that the spiral shell rib is wide, and b represents that screw channel is wide, and h represents groove depth, and z represents number of starts, and α represents the thread helix lift angle, and c represents the one-sided gap of fitting surface between stator and the rotor.
Claims (1)
1. the rotary case pump of adopting spiral labyrinth dynamic seal, it is characterized in that header pipe is in the liquid that revolves in the shell, impeller is arranged in the liquid, impeller with revolve shell and connect, revolve the shell joint electric rotating machine, header pipe is connected with the afflux outer pipe, on the afflux outer pipe, stator is housed, on impeller hub, be assembled with rotor, rotor matches with stator, turning multi-head spiral screw thread on the fitting surface of rotor and stator, the profile of tooth of this screw thread is rectangle or triangle or trapezoidal, the liquid that enters from pump inlet is under the effect of impeller, the liquid that obtains energy enters and revolves in the shell, the liquid that revolves in the shell is revolving under shell 1 drive, with revolve shell and rotate synchronously, liquid has higher kinetic energy and pressure energy, the liquid of impeller inlet is under the pumping action of impeller, pressure is lower, in revolving shell, form pressure reduction between liquid and the impeller inlet, under the effect of this pressure reduction, drive the rotor rotation by impeller, rotor sense of rotation and self rectangle or triangle or trapezoidal thread spiral shell are on the contrary, in the rotor rotation process, epitrochanterian rectangle or triangle or trapezoid spiral groove apply active force to the liquid in the groove: promoting the liquid overcome friction makes circular movement on the one hand, also promoting liquid on the other hand advances vertically, on the liquid of the frictional force action that liquid is produced by viscosity in groove, make it to produce axial back-pressure, rotor and stator have just formed the pumping pressure of rectangle or triangle or trapezoid spiral labyrinth body to the line shaft of liquid to thrust, owing to revolve the pressure that the interior fluid pressure of shell is higher than impeller inlet, and under the effect of pressure reduction, spiral chute Clearance Flow along rotor and stator composition, formation pressure reduction stream, the pump flow that produces when rectangle or triangle or trapezoid spiral labyrinth body has stoped the leakage of fluid greater than by the time when pressure reduction flows; The square threaded form parameter-definition is: a=1～3.5mm, b=1.5～5.5mm, h=1.5～4.5mm, z=15～40, a=60 °～85 °, c=0.08～0.8mm; The V thread screw parameter-definition is: a=0.35～1.5mm, b=1.5～5.0mm, h=2.0～7.5mm, z=15～40, a=65 °～85 °, θ=25 °～50 °, c=0.08～0.8mm; The trapezoidal thread parameter-definition is: a=0.35～1.5mm, b=1.5～5.0mm, h=1.5～4.5mm, z=15～40, a=55 °～85 °, θ=15 °～45 °, c=0.08～0.8mm; A in the formula is that the spiral shell rib is wide, and b is that screw channel is wide, and h is a groove depth, and z is a number of starts, and α is the thread helix lift angle, and c represents the one-sided gap of fitting surface between stator and the rotor, and θ is an isosceles trapezoid thread tooth angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010017696A CN101776087B (en) | 2010-01-13 | 2010-01-13 | Rotation shell pump adopting spiral labyrinth dynamic seal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010017696A CN101776087B (en) | 2010-01-13 | 2010-01-13 | Rotation shell pump adopting spiral labyrinth dynamic seal |
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| Publication Number | Publication Date |
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| CN101776087A true CN101776087A (en) | 2010-07-14 |
| CN101776087B CN101776087B (en) | 2012-10-24 |
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| CN201010017696A Expired - Fee Related CN101776087B (en) | 2010-01-13 | 2010-01-13 | Rotation shell pump adopting spiral labyrinth dynamic seal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987020A (en) * | 2015-02-26 | 2016-10-05 | 徐昌 | Open type pitot tube pump |
| CN107830179A (en) * | 2017-11-16 | 2018-03-23 | 江苏大学 | A kind of annular seal assembly that can effectively improve rotor dynamic behavior |
| CN111102232A (en) * | 2019-12-05 | 2020-05-05 | 兰州理工大学 | Differential rotary spraying pump |
| CN114278610A (en) * | 2021-12-15 | 2022-04-05 | 扬州大学 | Friction wear prevention device for floating impeller centrifugal pump |
| CN114458745A (en) * | 2022-01-26 | 2022-05-10 | 徐州徐工传动科技有限公司 | Low-leakage hydraulic torque converter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE585101C (en) * | 1930-07-25 | 1933-09-28 | Wilhelm Beyer Dipl Ing | Labyrinth seal against saturated steam under excess pressure, especially in high-pressure steam systems |
| SE8602873D0 (en) * | 1986-06-27 | 1986-06-27 | Flygt Ab | TETNINGSANORDNING |
| CN2921384Y (en) * | 2006-06-27 | 2007-07-11 | 江苏海狮泵业制造有限公司 | Ratary case pump with labyrinth groove structure on liquid collecting pipe |
| DE102007046014A1 (en) * | 2007-09-26 | 2009-04-02 | Daimler Ag | Pump and fuel cell system with a pump |
| CN201110276Y (en) * | 2007-11-09 | 2008-09-03 | 扬州市尚宝罗泵业有限公司 | Helical no-leakage seal pump |
| CN101270756A (en) * | 2008-04-16 | 2008-09-24 | 董洪广 | Helical leak-free seal pump |
-
2010
- 2010-01-13 CN CN201010017696A patent/CN101776087B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987020A (en) * | 2015-02-26 | 2016-10-05 | 徐昌 | Open type pitot tube pump |
| CN105987020B (en) * | 2015-02-26 | 2018-11-27 | 长乐品苑建材科技有限公司 | Open type pitot tube pump |
| CN109026820A (en) * | 2015-02-26 | 2018-12-18 | 乌鲁木齐九品芝麻信息科技有限公司 | Open type pitot tube pump |
| CN107830179A (en) * | 2017-11-16 | 2018-03-23 | 江苏大学 | A kind of annular seal assembly that can effectively improve rotor dynamic behavior |
| CN111102232A (en) * | 2019-12-05 | 2020-05-05 | 兰州理工大学 | Differential rotary spraying pump |
| CN114278610A (en) * | 2021-12-15 | 2022-04-05 | 扬州大学 | Friction wear prevention device for floating impeller centrifugal pump |
| CN114278610B (en) * | 2021-12-15 | 2023-08-18 | 扬州大学 | Design method of friction and wear preventing device for floating impeller centrifugal pump |
| CN114458745A (en) * | 2022-01-26 | 2022-05-10 | 徐州徐工传动科技有限公司 | Low-leakage hydraulic torque converter |
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| Publication number | Publication date |
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| CN101776087B (en) | 2012-10-24 |
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Granted publication date: 20121024 Termination date: 20140113 |