CN114922821B - Anti-blocking shielding pump and control method thereof - Google Patents
Anti-blocking shielding pump and control method thereof Download PDFInfo
- Publication number
- CN114922821B CN114922821B CN202210648584.8A CN202210648584A CN114922821B CN 114922821 B CN114922821 B CN 114922821B CN 202210648584 A CN202210648584 A CN 202210648584A CN 114922821 B CN114922821 B CN 114922821B
- Authority
- CN
- China
- Prior art keywords
- rotor
- stator
- communication hole
- pump
- blades
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 10
- 239000002245 particle Substances 0.000 claims abstract description 86
- 238000004891 communication Methods 0.000 claims abstract description 74
- 239000012535 impurity Substances 0.000 claims abstract description 44
- 230000002093 peripheral effect Effects 0.000 claims abstract description 40
- 238000004140 cleaning Methods 0.000 claims abstract description 35
- 239000007787 solid Substances 0.000 claims abstract description 33
- 238000007599 discharging Methods 0.000 claims description 22
- 239000000523 sample Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 15
- 239000013307 optical fiber Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- 239000011295 pitch Substances 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 abstract description 9
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—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
- F04D7/045—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 with means for comminuting, mixing stirring or otherwise treating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor 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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- 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
- F04D29/06—Lubrication
- F04D29/061—Lubrication 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5886—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling by injection
-
- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
Abstract
The invention discloses an anti-blocking shielding pump, which comprises a pump body (10), a centrifugal impeller (20), a filter (30), a bearing (40), a stator (50), a rotor (60), a circulating pipe (70) and a secondary cleaning device (80), wherein a stator shielding sleeve is arranged on the inner peripheral side of the stator, and a rotor shielding sleeve is arranged on the outer peripheral side of the rotor, and is characterized in that: the secondary cleaning device comprises an outer cylinder, an inner lining cylinder, a fixed spiral blade, a movable spiral blade, a first communication hole, a second communication hole and a containing groove, wherein the fixed spiral blade is arranged on the inner peripheral wall of the inner lining cylinder, the movable spiral blade is arranged on the outer periphery of the rotating shaft, the containing groove is arranged on the inner peripheral wall of the outer cylinder, the first communication hole and the second communication hole are arranged on the inner lining cylinder, and the communication holes are respectively communicated with the containing groove. According to the invention, solid impurity particles in the cooling liquid can be reduced, the impurity particles can be collected through the secondary cleaning device, the risk of blocking the shielding sleeve of the shielding pump is reduced, and the service life of the shielding pump is prolonged.
Description
Technical Field
The invention relates to the technical field of shielding pumps, in particular to an anti-blocking shielding pump and a control method thereof.
Background
The canned motor pump is a sealless pump, the pump means and the motor are sealed in the pumping medium, the pump and the drive motor are sealed in a pressure vessel filled with the pumping medium, the pressure vessel is only statically sealed, and a winding provides a rotating magnetic field and drives the rotor. This structure eliminates the rotary shaft sealing device of the conventional centrifugal pump and can be completely leak-free. Therefore, the canned motor pump is widely applied in the petrochemical field. In the actual use process, the motor of the canned motor pump needs to be cooled to work normally, the cooling of the driving motor is to cool through cooling liquid flowing through a gap between the stator and the rotor isolation sleeve/the canned motor sleeve, the cooling liquid is taken from a part of a pump conveying medium, the conveying medium of the canned motor pump can be provided with fine solid impurities, the gap between the stator isolation sleeve and the rotor isolation sleeve of the canned motor pump is usually very small, the pumping medium can be used after being filtered, and a filter screen can be used for directly covering the whole flow passage for filtering. In order to avoid blocking the flow, the design of the filtering holes is usually larger, so that the filtered cooling liquid entering the shielding pump contains more solid particles, and the particles wear the shielding sleeve of the pump more, even cause blockage, and influence the service life of the shielding pump.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an anti-blocking shielding pump and a control method thereof, which are used for solving the problem of blocking particles of a shielding sleeve of the existing shielding pump.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an anti-blocking shielding pump, it includes the pump body (10), centrifugal impeller (20), filter (30), bearing (40), stator (50), rotor (60), circulating pipe (70), secondary cleaning device (80), the pump body has inlet tube (101), outlet tube (102), centrifugal impeller is installed to the pump intracavity of the pump body, be connected with the filter on the outlet tube, the periphery side of filter is connected with the circulating pipe, the other end of circulating pipe is connected with secondary cleaning device, the motor between the pump body and the secondary cleaning device includes the stator, the rotor, the inner periphery side of stator is provided with stator shielding cover (501), the periphery side of rotor is provided with rotor shielding cover (602), pivot (601) is installed at the center of rotor, be provided with first bearing between pump chamber and the rotor chamber, be provided with the second bearing between rotor chamber and the secondary cleaning device, keep apart through stator shielding cover between rotor chamber and the stator chamber, its characterized in that: the secondary cleaning device (80) comprises an outer cylinder (801), an inner lining cylinder (802), fixed helical blades (803), movable helical blades (804), a first communication hole (805), a second communication hole (806) and a containing groove (807), wherein the inner lining cylinder is attached to the inner peripheral wall of the outer cylinder, an end flange of the outer cylinder is connected with the end part of a motor, the inner peripheral wall of the inner lining cylinder is provided with the fixed helical blades, the outer periphery of a rotating shaft is provided with the movable helical blades, the movable helical blades and the fixed helical blades are alternately/alternately arranged at intervals, the inner peripheral wall of the outer cylinder is provided with one or more containing grooves, the inner lining cylinder is provided with the first communication hole and the second communication hole, and the first communication hole and the second communication hole are respectively communicated with the containing groove.
Further, an impurity discharging pipe (808) is connected to the outer peripheral wall of the outer cylinder (801), one end of the impurity discharging pipe is communicated with the accommodating groove (807), the other end of the impurity discharging pipe is connected with a small auxiliary pump (809), and the impurity discharging pipe is used for discharging impurity particles accumulated in the accommodating groove under the action of the small auxiliary pump.
Further, the inner peripheral wall of the outer cylinder (801) is a first conical surface, the outer peripheral wall of the inner lining cylinder (802) is a second conical surface, the first conical surface is matched with the second conical surface, the right end of the outer cylinder is connected with an end cover (810), and the other end of the end cover is connected with the circulating pipe (70).
Further, the first communication hole (805) and the second communication hole (806) are arranged between the pitches of the fixed helical blades (803), the first communication hole is obliquely arranged or spirally arranged, the second communication hole is obliquely arranged or spirally arranged, the first communication hole is adjacently arranged with the second communication hole, the inclination direction or spiral direction of the first communication hole and the second communication hole is opposite, the aperture of the first communication hole is larger than that of the second communication hole, and solid particles are easier to enter the first communication hole and the accommodating groove; under the centrifugal spiral conveying action of the movable spiral blade and the fixed spiral blade, impurity particles enter the accommodating groove through the first communication hole, the second communication hole is used for backflow of pumped media, and the impurity particles cannot pass through the second communication hole.
Further, an optical fiber probe (90) is arranged in a rotor cavity of the motor, one end of the optical fiber probe (90) extends into a gap between the rotor shielding sleeve and the stator shielding sleeve, and the other end of the optical fiber probe is connected with a particle concentration detector (901); the optical fiber probe can measure the voltage change caused by the change of the particle concentration in the gap, so that the particle concentration in the gap is monitored in real time through the particle concentration detector.
Further, the filter (30) comprises a shell (301), a filter cartridge (302), an outlet joint (303) and a connecting flange (304), wherein the filter cartridge is arranged in the shell, an annular space is arranged between the filter cartridge and the shell, the upper end and the lower end of the shell are respectively provided with the connecting flange, the peripheral wall of the shell is provided with the outlet joint, the outlet joint is connected with a circulating pipe, the filter cartridge is arranged in the shell through a lower end step part, and the filter is used for filtering pumping media.
Further, the inner peripheral walls of the first bearing and the second bearing are provided with spiral grooves (401) for enabling the pumped medium to flow directionally.
Further, one or more stator blades (502) are arranged on the inner peripheral wall of the stator shielding sleeve (501), the stator blades extend along the axial direction, the section of each stator blade is in an inverted triangle shape, so that impurity particles can be prevented from accumulating at the bottom, and a reaction force is given to solid particles in a gap between the rotor and the stator; the periphery wall of rotor shielding cover (602) is provided with rotor blade (603), and rotor blade is the heliciform and extends, and rotor blade's cross-section is the arc, can avoid impurity particle to pile up in the bottom, and rotor blade rotation can provide driving force simultaneously, makes the clearance between granule quick pass rotor and the stator.
A control method of an anti-blocking shielding pump, comprising:
(1) Starting a shielding pump, inputting liquid from an inlet pipe, outputting the liquid from an outlet pipe to a filter after rotating through a centrifugal impeller, filtering the liquid through the filter, enabling primary cleaning medium to enter an annular space between a filter cartridge and a shell, and discharging the primary cleaning medium through an outlet joint; then the liquid is conveyed to a secondary cleaning device through a circulating pipe, under the centrifugal spiral conveying action of the movable spiral blade and the fixed spiral blade, solid particles are accelerated, the solid particles are thrown to the inner wall of the lining cylinder under the action of centrifugal force and enter the containing groove through the first communication hole, the liquid flows back/is discharged through the second communication hole, enters the rotor cavity through the spiral groove at the inner peripheral side of the second bearing, and lubricates/cools the second bearing; after passing through the rotor cavity, the pumped medium enters the pump cavity of the pump body through the spiral groove at the inner peripheral side of the first bearing again, so that the medium can be reused;
(2) When the filtered medium enters a gap between the stator shielding sleeve and the rotor shielding sleeve, the rotor blades on the rotor shielding sleeve rotate to drive liquid to flow, and the stator blades on the stator shielding sleeve and the rotor blades on the rotor shielding sleeve act together to drive solid particles to pass through the gap quickly; the fiber probe in the gap can monitor the particle concentration in the gap in real time, and when the particle concentration exceeds a threshold value, the driving force acting on the solid particles is increased by increasing the rotating speed of the motor rotor, so that the solid particles are accelerated to pass through the gap;
(3) The small auxiliary pump is started periodically, and the impurity discharging pipe is used for discharging impurity particles accumulated in the accommodating groove under the action of the small auxiliary pump; the holding tank is also provided with the fiber probe for detect particle concentration, when particle concentration exceeded the threshold value, it is unusual to indicate that impurity removal granule exists, need dismantle the lining barrel and maintain or clear up this moment.
According to the anti-blocking shielding pump and the control method thereof, solid impurity particles in cooling liquid can be reduced, the cooling liquid can quickly pass through gaps between shielding sleeves, the impurity particles can be collected through the secondary cleaning device, the risk of blocking the shielding sleeves of the shielding pump is reduced, and the service life of the shielding pump is prolonged.
Drawings
FIG. 1 is a schematic diagram of an anti-blocking canned motor pump according to the present invention;
FIG. 2 is a schematic view of a filter according to the present invention;
FIG. 3 is a schematic view of a secondary cleaning device according to the present invention;
FIG. 4 is a schematic view of a secondary cleaning device according to the present invention;
FIG. 5 is a schematic view of a stator structure according to the present invention;
fig. 6 is a schematic view of a rotor structure according to the present invention.
In the figure: pump body 10, inlet pipe 101, outlet pipe 102, (centrifugal) impeller 20, filter 30, housing 301, filter cartridge 302, outlet joint 303, connection flange 304, (graphite) bearing 40, spiral groove 401, stator 50, stator shield 501, stator vane 502, rotor 60, rotating shaft 601, rotor shield 602, rotor vane 603, circulation pipe 70, secondary cleaning device 80, outer cylinder 801, inner liner 802, stator spiral vane 803, moving spiral vane 804, first communication hole 805, second communication hole 806, accommodation groove 807, impurity discharge pipe 808, small auxiliary pump 809, end cap 810, optical fiber probe 90, particle concentration detector 901, flow direction "→".
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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.
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 6, an anti-blocking shield pump comprises a pump body 10, a centrifugal impeller 20, a filter 30, a bearing 40, a stator 50, a rotor 60, a circulating pipe 70 and a secondary cleaning device 80, wherein the pump body 10 is provided with an inlet pipe 101 and an outlet pipe 102, the centrifugal impeller 20 is installed in a pump cavity of the pump body 10, the filter 30 is connected to the outlet pipe 102, the circulating pipe 70 is connected to the outer peripheral side of the filter 30, the other end of the circulating pipe 70 is connected to the secondary cleaning device 80, a motor between the pump body 10 and the secondary cleaning device 80 comprises a stator 50 and a rotor 60, a stator shielding sleeve 501 is arranged on the inner peripheral side of the stator 50, a rotor shielding sleeve 602 is arranged on the outer peripheral side of the rotor 60, a rotating shaft 601 is installed in the center of the rotor 60, a first bearing 40 is arranged between the pump cavity and the rotor cavity, a second bearing 40 is arranged between the rotor cavity and the secondary cleaning device 80, and the rotor cavity is isolated by the stator shielding sleeve 501, and the anti-blocking shield pump is characterized in that: the secondary cleaning device 80 includes an outer cylinder 801, an inner liner 802, fixed spiral blades 803, movable spiral blades 804, a first communication hole 805, a second communication hole 806, and a receiving groove 807, the inner liner 802 is bonded to an inner peripheral wall of the outer cylinder 801, an end flange of the outer cylinder 801 is connected to a motor end, the inner peripheral wall of the inner liner 802 is provided with the fixed spiral blades 803, an outer periphery of the rotating shaft 601 is provided with the movable spiral blades 804, the movable spiral blades 804 and the fixed spiral blades 803 are alternately/alternately arranged, the inner peripheral wall of the outer cylinder 801 is provided with one or more receiving grooves 807, the inner liner 802 is provided with a first communication hole 805 and a second communication hole 806, and the first communication hole 805 and the second communication hole 806 are respectively communicated with the receiving groove 807.
Further, an impurity discharging pipe 808 is connected to the outer peripheral wall of the outer tube 801, one end of the impurity discharging pipe 808 is connected to the accommodating groove 807, the other end of the impurity discharging pipe 808 is connected to a small auxiliary pump 809, and the impurity discharging pipe 808 is used for discharging impurity particles accumulated in the accommodating groove 807 by the small auxiliary pump 809.
Further, the inner circumferential wall of the outer cylinder 801 is a first conical surface, the outer circumferential wall of the inner liner 802 is a second conical surface, the first conical surface is matched with the second conical surface, the right end of the outer cylinder 801 is connected with an end cover 810, and the other end of the end cover 810 is connected with the circulation pipe 70. The outer peripheral wall of the lining cylinder 802 is in taper fit with the inner peripheral wall of the outer cylinder 801, so that solid particles can be prevented from being blocked, the lining cylinder 802 can be easily taken out, and cleaning is facilitated.
Further, the first communication hole 805 and the second communication hole 806 are arranged between pitches of the fixed screw blade 803, the first communication hole 805 is arranged obliquely or spirally, the second communication hole 806 is arranged obliquely or spirally, the first communication hole 805 is arranged adjacent to the second communication hole 806, the inclination direction or spiral direction of the first communication hole 805 and the second communication hole 806 are opposite, and the aperture of the first communication hole 805 is larger than that of the second communication hole 806, so that solid particles can enter the first communication hole 805 and the accommodating groove 807 more easily; under the centrifugal screw feeding action of the movable screw blade 804 and the fixed screw blade 803, the impurity particles enter the accommodating groove 807 through the first communication hole 805, and the second communication hole 806 is used for the backflow of the pumped medium, but the impurity particles cannot pass through the second communication hole 806.
When the primary cleaning medium filtered by the filter 30 enters the secondary cleaning device 80 through the circulation pipe 70, the liquid starts to rotate along the spiral blades under the centrifugal spiral conveying action of the movable spiral blade 804 and the fixed spiral blade 803, and the solid particles with larger mass are thrown onto the inner wall of the lining barrel 802 under the action of centrifugal force and enter the first communication hole 805 and the accommodating groove 807 along with the rotation of the liquid, so that the solid particles in the pumping medium entering the rotor cavity are greatly reduced, and abrasion and blockage are more difficult to cause when the solid particles pass through the gap between the stator shielding sleeve 501 and the rotor shielding sleeve 602.
Further, an optical fiber probe 90 is arranged in a rotor cavity of the motor, one end of the optical fiber probe 90 extends into a gap between the rotor shielding sleeve 602 and the stator shielding sleeve 501, and the other end of the optical fiber probe 90 is connected with a particle concentration detector 901. The fiber probe 90 can measure the voltage change caused by the change of the particle concentration in the gap, thereby monitoring the particle concentration in the gap in real time by the particle concentration detector 901.
Further, the filter 30 includes a housing 301, a filter cartridge 302, an outlet connector 303, and a connection flange 304, the filter cartridge 302 is disposed in the housing 301, an annular space/interval is provided between the filter cartridge 302 and the housing 301, the upper and lower ends of the housing 301 are respectively provided with the connection flange 304, the outer circumferential wall of the housing 301 is provided with the outlet connector 303, the outlet connector 303 is connected with the circulation pipe 70, and the filter 30 is used for filtering the pumping medium. The filter cartridge 302 is mounted in the housing 301 by a lower end stepped portion, and is convenient to install/replace. The pumped medium enters the annular space through the filter cartridge 302 and then flows into the circulation tube 70.
Further, the (graphite) first bearing 40, the inner circumferential wall of the second bearing 40 are provided with spiral grooves 401, the spiral grooves 401 being used for generating a directional flow of the pumping medium, as indicated by arrow "≡" in fig. 1.
Further, the inner peripheral wall of the stator shielding case 501 is provided with one or more stator blades 502, the stator blades 502 extend along the axial direction, the section of the stator blades 502 is in an inverted triangle shape, so that impurity particles can be prevented from accumulating at the bottom, and a reaction force is given to solid particles in a gap between the rotor and the stator.
Further, the peripheral wall of the rotor shielding sleeve 602 is provided with rotor blades 603, the rotor blades 603 extend in a spiral shape, the section of each rotor blade 603 is arc-shaped or semicircular, impurity particles can be prevented from being accumulated at the bottom, and meanwhile, the rotor blades 603 rotate to provide driving force, so that the particles can rapidly pass through a gap between the rotor and the stator.
When the rotor blades 603 on the rotor shroud 602 rotate, a force F2 perpendicular to the rotor blades 603 is given to the solid particles in the gap, the stator blades 502 give a reaction force F1 to the solid particles, and the resultant force of the two forces provides a forward driving force F to the solid particles;
wherein f= (m×n×2pi r×cos θ -Q/a)/60; wherein m is the mass of the particles, n is the rotating speed, R is the distance from the position of the particles to the center of the rotating shaft 601, and a numerical value part can be taken for design/calculation during design/calculation; the driving force of the particles can be adjusted by adjusting the rotating speed, θ is the helix angle of the rotor blade 603, Q is the unit flow of the cooling liquid, and a is the gap area between the rotor and the stator;
where θ=arctan (L/2pi R), a=pi (R 1 -R 2 ) 2 ；
Where L is the length of rotor shroud 602, R 1 For the radius of the stator shielding sleeve, R 2 The radius of the rotor shielding sleeve is set; the design/calculation can be performed by taking a numerical part during the design/calculation.
A control method of an anti-blocking shielding pump, comprising:
(1) The canned motor pump is started, liquid is input from the inlet pipe 101, is output from the outlet pipe 102 to the filter 30 after rotating through the centrifugal impeller 20, is filtered by the filter 30, and the primary cleaning medium enters the annular space between the filter cartridge 302 and the housing 301 and is discharged through the outlet joint 303; then, the liquid is conveyed to the secondary cleaning device 80 through the circulation pipe 70, the solid particles are accelerated under the centrifugal spiral conveying action of the movable spiral blade 804 and the fixed spiral blade 803, the solid particles are thrown to the inner wall of the lining barrel 802 under the action of centrifugal force and enter the accommodating groove 807 through the first communication hole 805, the liquid flows back/is discharged through the second communication hole 806, enters the rotor cavity through the spiral groove on the inner peripheral side of the second bearing 400, and the second bearing/graphite bearing 40 is lubricated/cooled; after passing through the rotor cavity, the pumped medium enters the pump cavity of the pump body 10 again through the spiral groove at the inner peripheral side of the first bearing 40, so that the medium can be reused;
(2) After the filtered medium enters the gap between the stator shielding sleeve 501 and the rotor shielding sleeve 602, the rotor blades 603 on the rotor shielding sleeve rotate to drive liquid to flow, and the stator blades 502 on the stator shielding sleeve and the rotor blades 603 on the rotor shielding sleeve act together to drive solid particles to pass through the gap quickly; the fiber probe 90 in the gap can monitor the particle concentration in the gap in real time, and when the particle concentration exceeds a threshold value, the driving force acting on the solid particles is increased by increasing the rotating speed of the motor rotor, so that the solid particles are accelerated to pass through the gap;
(3) The small auxiliary pump 809 is periodically turned on, and the impurity discharging pipe 808 is used to discharge the impurity particles accumulated in the accommodating groove 807 by the small auxiliary pump 809; a fiber optic probe 90 may also be provided in the receiving groove 807 to detect particle concentration, indicating the presence of impurity-depleted particle anomalies when the particle concentration exceeds a threshold value, at which time the liner 802 may need to be removed for maintenance/cleaning.
According to the anti-blocking shielding pump and the control method thereof, solid impurity particles in cooling liquid can be reduced, the cooling liquid can quickly pass through gaps between shielding sleeves, the impurity particles can be collected through the secondary cleaning device, the risk of blocking the shielding sleeves of the shielding pump is reduced, and the service life of the shielding pump is prolonged.
The above-described embodiments are illustrative of the present invention and are not intended to be limiting, and it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.
Claims (1)
1. The utility model provides an anti-blocking shielding pump, it includes the pump body (10), centrifugal impeller (20), filter (30), bearing (40), stator (50), rotor (60), circulating pipe (70), secondary cleaning device (80), the pump body has inlet tube (101), outlet tube (102), centrifugal impeller is installed to the pump intracavity of the pump body, be connected with the filter on the outlet tube, the periphery side of filter is connected with the circulating pipe, the other end of circulating pipe is connected with secondary cleaning device, the motor between the pump body and the secondary cleaning device includes the stator, the rotor, the inner periphery side of stator is provided with stator shielding cover (501), the periphery side of rotor is provided with rotor shielding cover (602), pivot (601) is installed at the center of rotor, be provided with first bearing between pump chamber and the rotor chamber, be provided with the second bearing between rotor chamber and the secondary cleaning device, keep apart through stator shielding cover between rotor chamber and the stator chamber, its characterized in that: the secondary cleaning device (80) comprises an outer cylinder (801), an inner lining cylinder (802), fixed spiral blades (803), movable spiral blades (804), a first communication hole (805), a second communication hole (806) and a containing groove (807), wherein the inner lining cylinder is connected to the inner peripheral wall of the outer cylinder in a fitting manner, an end flange of the outer cylinder is connected with the end part of a motor, the inner peripheral wall of the inner lining cylinder is provided with the fixed spiral blades, the outer periphery of a rotating shaft is provided with the movable spiral blades, the movable spiral blades and the fixed spiral blades are alternately/alternately arranged, the inner peripheral wall of the outer cylinder is provided with one or more containing grooves, the inner lining cylinder is provided with the first communication hole and the second communication hole, and the first communication hole and the second communication hole are respectively communicated with the containing grooves;
an impurity discharging pipe (808) is connected to the outer peripheral wall of the outer cylinder (801), one end of the impurity discharging pipe is communicated with the accommodating groove (807), the other end of the impurity discharging pipe is connected with an auxiliary pump (809), and the impurity discharging pipe is used for discharging impurity particles accumulated in the accommodating groove under the action of the auxiliary pump; the inner peripheral wall of the outer cylinder (801) is a first conical surface, the outer peripheral wall of the inner lining cylinder (802) is a second conical surface, the first conical surface is matched with the second conical surface, the right end of the outer cylinder is connected with an end cover (810), and the other end of the end cover is connected with the circulating pipe (70); the first communication holes (805) and the second communication holes (806) are arranged between the screw pitches of the fixed screw blades (803), the first communication holes are obliquely arranged or spirally arranged, the second communication holes are obliquely arranged or spirally arranged, the first communication holes are adjacently arranged with the second communication holes, the inclination directions or spiral directions of the first communication holes and the second communication holes are opposite, and the aperture of the first communication holes is larger than that of the second communication holes, so that solid particles can enter the first communication holes and the accommodating grooves more easily; under the centrifugal spiral conveying action of the movable spiral blade and the fixed spiral blade, impurity particles enter the accommodating groove through the first communication hole, the second communication hole is used for backflow of a pumping medium, and the impurity particles cannot pass through the second communication hole; an optical fiber probe (90) is arranged in a rotor cavity of the motor, one end of the optical fiber probe (90) extends into a gap between the rotor shielding sleeve and the stator shielding sleeve, and the other end of the optical fiber probe is connected with a particle concentration detector (901); the optical fiber probe can measure voltage change caused by the change of the particle concentration in the gap, so that the particle concentration in the gap is monitored in real time through the particle concentration detector; the filter (30) comprises a shell (301), a filter cartridge (302), an outlet joint (303) and a connecting flange (304), wherein the filter cartridge is arranged in the shell, an annular space is arranged between the filter cartridge and the shell, the upper end and the lower end of the shell are respectively provided with the connecting flange, the peripheral wall of the shell is provided with the outlet joint, the outlet joint is connected with a circulating pipe, the filter cartridge is arranged in the shell through a lower end step part, and the filter is used for filtering pumping media; the inner peripheral walls of the first bearing and the second bearing are provided with spiral grooves (401) which are used for enabling a pumping medium to flow directionally; the inner peripheral wall of the stator shielding sleeve (501) is provided with one or more stator blades (502), the stator blades extend along the axial direction, the section of each stator blade is in an inverted triangle shape, so that impurity particles can be prevented from accumulating at the bottom, and a reaction force is given to solid particles in a gap between the rotor and the stator; the peripheral wall of the rotor shielding sleeve (602) is provided with rotor blades (603), the rotor blades extend in a spiral shape, the sections of the rotor blades are arc-shaped, impurity particles can be prevented from being accumulated at the bottom, and meanwhile, the rotor blades can provide driving force through rotation, so that the particles can rapidly pass through a gap between a rotor and a stator;
the control method of the anti-blocking shielding pump comprises the following steps:
(1) Starting a shielding pump, inputting liquid from an inlet pipe, outputting the liquid from an outlet pipe to a filter after rotating through a centrifugal impeller, filtering the liquid through the filter, enabling primary cleaning medium to enter an annular space between a filter cartridge and a shell, and discharging the primary cleaning medium through an outlet joint; then the liquid is conveyed to a secondary cleaning device through a circulating pipe, under the centrifugal spiral conveying action of the movable spiral blade and the fixed spiral blade, solid particles are accelerated, the solid particles are thrown to the inner wall of the lining cylinder under the action of centrifugal force and enter the containing groove through the first communication hole, the liquid flows back/is discharged through the second communication hole, enters the rotor cavity through the spiral groove at the inner peripheral side of the second bearing, and lubricates/cools the second bearing; after passing through the rotor cavity, the pumped medium enters the pump cavity of the pump body through the spiral groove at the inner peripheral side of the first bearing again, so that the medium can be reused;
(2) When the filtered medium enters a gap between the stator shielding sleeve and the rotor shielding sleeve, the rotor blades on the rotor shielding sleeve rotate to drive liquid to flow, and the stator blades on the stator shielding sleeve and the rotor blades on the rotor shielding sleeve act together to drive solid particles to pass through the gap quickly; the fiber probe in the gap can monitor the particle concentration in the gap in real time, and when the particle concentration exceeds a threshold value, the driving force acting on the solid particles is increased by increasing the rotating speed of the motor rotor, so that the solid particles are accelerated to pass through the gap;
(3) The auxiliary pump is started periodically, and the impurity discharging pipe is used for discharging impurity particles accumulated in the accommodating groove under the action of the auxiliary pump; the holding tank is also provided with the fiber probe for detect particle concentration, when particle concentration exceeded the threshold value, it is unusual to indicate that impurity removal granule exists, need dismantle the lining barrel and maintain or clear up this moment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210648584.8A CN114922821B (en) | 2022-06-09 | 2022-06-09 | Anti-blocking shielding pump and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210648584.8A CN114922821B (en) | 2022-06-09 | 2022-06-09 | Anti-blocking shielding pump and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114922821A CN114922821A (en) | 2022-08-19 |
| CN114922821B true CN114922821B (en) | 2024-01-05 |
Family
ID=82813176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210648584.8A Active CN114922821B (en) | 2022-06-09 | 2022-06-09 | Anti-blocking shielding pump and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114922821B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024047032A1 (en) * | 2022-08-30 | 2024-03-07 | SVANEHØJ Danmark A/S | A submerged fuel pump for pumping liquidised fluids |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2806848Y (en) * | 2005-06-14 | 2006-08-16 | 成都希望电子研究所 | Filter for canned motor pump |
| CN102287378A (en) * | 2011-09-22 | 2011-12-21 | 江苏巨浪泵阀有限公司 | Pulp pump |
| WO2013071877A1 (en) * | 2011-11-18 | 2013-05-23 | 博研国际有限公司 | Rotating container and fluid filtration device and system using the rotating container |
| DE102013011209B3 (en) * | 2013-07-04 | 2014-01-23 | Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt | Controllable coolant pump for internal combustion engine mounted in e.g. truck, has piston rod that is connected with permanent magnet, and linearly moved with respect to solenoid coil |
| CN103629118A (en) * | 2013-12-10 | 2014-03-12 | 江苏大学 | Vertical pipeline permanent magnet canned motor pump |
| CN205013312U (en) * | 2015-10-13 | 2016-02-03 | 襄阳五二五泵业有限公司 | Vertical sediment thick liquid self priming pump |
| CN108808950A (en) * | 2018-07-31 | 2018-11-13 | 浙江浙水工贸有限公司 | Protected type permanent magnetism high speed motor for submerged pump |
| CN110571954A (en) * | 2019-10-14 | 2019-12-13 | 上海空间推进研究所 | Annular flow passage structure between stator and rotor of shielded motor |
| CN213478678U (en) * | 2020-10-28 | 2021-06-18 | 山东鲁辰泵业有限公司 | Reverse circulation shield pump with connector |
-
2022
- 2022-06-09 CN CN202210648584.8A patent/CN114922821B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2806848Y (en) * | 2005-06-14 | 2006-08-16 | 成都希望电子研究所 | Filter for canned motor pump |
| CN102287378A (en) * | 2011-09-22 | 2011-12-21 | 江苏巨浪泵阀有限公司 | Pulp pump |
| WO2013071877A1 (en) * | 2011-11-18 | 2013-05-23 | 博研国际有限公司 | Rotating container and fluid filtration device and system using the rotating container |
| DE102013011209B3 (en) * | 2013-07-04 | 2014-01-23 | Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt | Controllable coolant pump for internal combustion engine mounted in e.g. truck, has piston rod that is connected with permanent magnet, and linearly moved with respect to solenoid coil |
| CN103629118A (en) * | 2013-12-10 | 2014-03-12 | 江苏大学 | Vertical pipeline permanent magnet canned motor pump |
| CN205013312U (en) * | 2015-10-13 | 2016-02-03 | 襄阳五二五泵业有限公司 | Vertical sediment thick liquid self priming pump |
| CN108808950A (en) * | 2018-07-31 | 2018-11-13 | 浙江浙水工贸有限公司 | Protected type permanent magnetism high speed motor for submerged pump |
| CN110571954A (en) * | 2019-10-14 | 2019-12-13 | 上海空间推进研究所 | Annular flow passage structure between stator and rotor of shielded motor |
| CN213478678U (en) * | 2020-10-28 | 2021-06-18 | 山东鲁辰泵业有限公司 | Reverse circulation shield pump with connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114922821A (en) | 2022-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102803731B (en) | For managing the method and apparatus of the fluid stream in screw pump system | |
| CN114922821B (en) | Anti-blocking shielding pump and control method thereof | |
| US5336048A (en) | Fluid directing device for seal chamber | |
| CN105626540B (en) | Sectional multi-stage centrifugal pump | |
| EA036287B1 (en) | Rotary parts for a slurry pump | |
| CN100489312C (en) | Pump or turbine, drive unit comprising such a pump or turbine and outboard motor | |
| US3788762A (en) | Self-lubricated pump with means for lubricant purification | |
| EP3276178B1 (en) | Volute pump | |
| WO1984002858A1 (en) | Turbo-cyclone for separating suspensions | |
| KR101948885B1 (en) | A Pump improved sludge removal by multi nozzle | |
| CN110787492A (en) | Inertia separation device for high-efficiency energy utilization | |
| AU7305591A (en) | Centrifugal pump lubricant strainer system | |
| WO2007096736A1 (en) | Pump seal apparatus | |
| US4283005A (en) | Pump and centrifugal separator apparatus | |
| CN210386216U (en) | Horizontal screw centrifugal machine | |
| US10816008B1 (en) | Dual stage grinder pump | |
| CN219412952U (en) | Self-cleaning submerged pump and vertical barrel bag pump | |
| US3877834A (en) | Self-priming centrifugal pumps | |
| RU2182263C2 (en) | Centrifugal pump | |
| RU204253U1 (en) | Ball cleaning pump | |
| JP6595382B2 (en) | Vertical shaft pump | |
| CN213743990U (en) | Water pump, engine cooling system and car | |
| CN211383919U (en) | Inertia separation device for high-efficiency energy utilization | |
| CN214945042U (en) | Double-suction multistage middle-open centrifugal pump | |
| RU2427725C2 (en) | Submerged labyrinth-screw pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |