CN114922821A - Anti-blocking shielding pump and control method thereof - Google Patents

Abstract

The invention discloses an anti-blocking shield 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 shield sleeve is arranged on the inner peripheral side of the stator, and a rotor shield sleeve is arranged on the outer peripheral side of the rotor, and the anti-blocking shield pump is characterized in that: the secondary cleaning device comprises an outer cylinder, an inner cylinder, a fixed helical blade, a movable helical blade, a first communicating hole, a second communicating hole and a containing tank, wherein the fixed helical blade is arranged on the inner peripheral wall of the inner cylinder, the movable helical blade is arranged at the periphery of a rotating shaft, the containing tank is arranged on the inner peripheral wall of the outer cylinder, the first communicating hole and the second communicating hole are formed in the inner cylinder, and the communicating holes are respectively communicated with the containing tank. The invention can reduce solid impurity particles in the cooling liquid, can collect the impurity particles through the secondary cleaning device, reduces the risk of blocking of the shielding sleeve of the shielding pump, and prolongs the service life of the shielding pump.

Description

A kind of anti-jamming canned pump and control method thereof

technical field

The invention relates to the technical field of canned pumps, in particular to an anti-jamming canned pump and a control method thereof.

Background technique

The canned pump is a sealless pump, the pump device and motor are sealed in the pumping medium, the pump and the driving motor are sealed in a pressure vessel filled with the pumping medium, this pressure vessel has only a static seal, and is sealed by the pumping medium. A winding provides the rotating magnetic field and drives the rotor. This structure cancels the rotary shaft sealing device of the traditional centrifugal pump, and can be completely leak-free. Therefore, the canned pump has been widely used in the petrochemical field. In the actual use process, the motor of the canned pump needs to be cooled to work normally. The cooling of the driving motor is to cool down by flowing cooling liquid between the gap between the stator and the rotor isolation sleeve/shielding sleeve, and the cooling liquid is taken from a part of the pump conveying medium , the conveying medium of the canned pump will have fine solid impurities, and the gap between the stator isolation sleeve and the rotor isolation sleeve of the canned pump is usually very small, the pumping medium must be filtered before use, usually the filter screen is used to directly cover the entire flow. channel to filter. In order not to impede the flow, the filter hole is usually designed to be larger. Therefore, the cooling liquid entering the canned pump after filtering contains more solid particles, and these particles will wear more to the shielding sleeve of the pump, and may even be blocked. Affect the life of the canned pump.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide an anti-jamming canned pump and a control method thereof, which are used to solve the problem of particle jamming of the isolation sleeve of the current canned pump, and the present invention can reduce the amount of The solid impurity particles can quickly pass through the gap between the shielding sleeves, and the impurity particles can be collected by the secondary cleaning device, which reduces the risk of blocking the shielding sleeve of the canned pump and prolongs the service life of the canned pump.

In order to achieve the above object, the technical scheme adopted in the present invention is:

An anti-jamming canned pump, comprising a pump body (10), a centrifugal impeller (20), a filter (30), a bearing (40), a stator (50), a rotor (60), a circulation pipe (70), two The secondary cleaning device (80), the pump body has an inlet pipe (101) and an outlet pipe (102), a centrifugal impeller is installed in the pump cavity of the pump body, a filter is connected to the outlet pipe, and a circulation pipe is connected to the outer peripheral side of the filter , the other end of the circulation pipe is connected with the secondary cleaning device, the motor between the pump body and the secondary cleaning device includes a stator and a rotor, the inner peripheral side of the stator is provided with a stator shielding sleeve (501), and the outer peripheral side of the rotor is provided with a A rotor shielding sleeve (602), a rotating shaft (601) is installed in the center of the rotor, a first bearing is arranged between the pump cavity and the rotor cavity, a second bearing is arranged between the rotor cavity and the secondary cleaning device, and the rotor cavity and the stator cavity are arranged. They are isolated by a stator shield sleeve, characterized in that the secondary cleaning device (80) includes an outer cylinder (801), an inner liner (802), a fixed helical blade (803), a moving helical blade (804), a first communication The hole (805), the second communication hole (806), the accommodating groove (807), the inner liner is closely connected to the inner peripheral wall of the outer cylinder, the end flange of the outer cylinder is connected with the end of the motor, and the inner liner is connected to the end of the motor. The inner peripheral wall is provided with fixed helical blades, the outer periphery of the rotating shaft is provided with moving helical blades, the moving helical blades and the fixed helical blades are arranged alternately/spaced, the inner peripheral wall of the outer cylinder is provided with one or more accommodating grooves, and the inner lining cylinder is provided with The first communication hole and the second communication hole are respectively communicated with the accommodating groove.

Further, the outer peripheral wall of the outer cylinder (801) is connected with an impurity discharge pipe (808), one end of the impurity discharge pipe is communicated with the accommodating tank (807), and the other end of the impurity discharge pipe is connected with a small auxiliary pump (809). Connected, under the action of a small auxiliary pump, the impurity discharge pipe is used to discharge the impurity particles accumulated in the holding tank.

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 matches the second conical surface, and the outer The right end of the cylinder is connected with an end cap (810), and the other end of the end cap is connected with the circulation pipe (70).

Further, the first communication holes (805) and the second communication holes (806) are arranged between the pitches of the fixed helical blades (803), the first communication holes are inclined or spirally arranged, and the second communication holes are inclined or arranged in a spiral manner. Spiral arrangement, the first communication hole is adjacent to the second communication hole, the inclination direction or helical direction of the first communication hole and the second communication hole are opposite, and the aperture of the first communication hole is larger than the aperture of the second communication hole, so that the solid particles are more dense. It is easy to enter the first communication hole and the accommodating groove; under the centrifugal screw conveying action of the moving helical blade and the fixed helical blade, the impurity particles enter the accommodating groove through the first communication hole, and the second communication hole is used for the backflow of the pumping medium, but the impurities The particles cannot pass through the second communication hole.

Further, an optical fiber probe (90) is arranged in the rotor cavity of the motor, one end of the optical fiber probe (90) extends into the gap between the rotor shielding sleeve and the stator shielding sleeve, and the other end is connected to the 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 as to monitor the particle concentration in the gap in real time through the particle concentration detector.

Further, the filter (30) includes a housing (301), a filter cartridge (302), an outlet joint (303), and a connecting flange (304), the filter cartridge is arranged in the housing, and a filter cartridge is provided between the filter cartridge and the housing. In the annular space, the upper and lower ends of the casing are respectively provided with connecting flanges, the outer peripheral wall of the casing is provided with an outlet joint, the outlet joint is connected with the circulation pipe, the filter cartridge is installed in the casing through the step at the lower end, and the filter is used to filter the pumping medium .

Further, the inner peripheral walls of the first bearing and the second bearing are provided with helical grooves (401), and the helical grooves are used for directional flow of the pumping medium.

Further, the inner peripheral wall of the stator shielding sleeve (501) is provided with one or more stator blades (502), the stator blades extend in the axial direction, and the cross-section of the stator blades is an inverted triangle, which can avoid the accumulation of impurity particles at the bottom, and A reaction force is given to the solid particles in the gap between the rotor and the stator; the outer peripheral wall of the rotor shielding sleeve (602) is provided with rotor blades (603), the rotor blades extend in a spiral shape, and the cross-section of the rotor blades is arc-shaped, which can avoid The impurity particles accumulate at the bottom, and the rotation of the rotor blades can provide the driving force, so that the particles quickly pass through the gap between the rotor and the stator.

A control method for an anti-jamming canned pump, comprising:

(1) Turn on the canned pump, input the liquid from the inlet pipe, and output it from the outlet pipe to the filter after the centrifugal impeller rotates. After filtering through the filter, the primary cleaning medium enters the annular space between the filter cartridge and the casing, and passes through The outlet joint is discharged; then it is transported to the secondary cleaning device through the circulation pipe. The liquid accelerates the solid particles under the centrifugal helical conveying action of the moving helical blades and the fixed helical blades, and the solid particles are thrown to the inner wall of the lining cylinder by the centrifugal force. And enter the accommodating groove through the first communication hole, and the liquid flows back/discharge through the second communication hole, and enters the rotor cavity through the spiral groove on the inner peripheral side of the second bearing to lubricate/cool the second bearing; pumping medium After passing through the rotor cavity, it enters the pump cavity of the pump body through the spiral groove on the inner peripheral side of the first bearing again to realize the reuse of the medium;

(2) When the filtered medium enters the gap between the stator shielding sleeve and the rotor shielding sleeve, the rotor blades on the rotor shielding sleeve rotate to drive the liquid to flow, and the stator blades on the stator shielding sleeve and the rotor on the rotor shielding sleeve rotate. The blades work together to give the solid particles a driving force to quickly pass through the gap; the fiber optic probe in the gap can monitor the particle concentration in the gap in real time. When the particle concentration exceeds the threshold, by increasing the speed of the motor rotor, it acts on the The driving force on the solid particles becomes larger, which accelerates the solid particles through the gap;

(3) Turn on the small auxiliary pump regularly. Under the action of the small auxiliary pump, the impurity discharge pipe is used to discharge the impurity particles accumulated in the holding tank; the holding tank is also provided with an optical fiber probe to detect the particle concentration. When the concentration exceeds the threshold, it means that there is abnormal discharge of impurity particles. At this time, the inner liner needs to be disassembled for maintenance or cleaning.

The anti-jamming shielded pump and the control method thereof of the present invention can reduce the solid impurity particles in the cooling liquid, promote the rapid passage of the solid impurity particles through the gap between the shielding sleeves, and can collect the impurity particles through the secondary cleaning device, thereby reducing the The risk of jamming of the shielding sleeve of the canned pump extends the service life of the canned pump.

Description of drawings

1 is a schematic structural diagram of an anti-jamming canned pump of the present invention;

Fig. 2 is the filter structure schematic diagram of the present invention;

3 is a schematic structural diagram of the secondary cleaning device of the present invention;

4 is a schematic structural diagram of the secondary cleaning device of the present invention;

5 is a schematic diagram of the stator structure of the present invention;

FIG. 6 is a schematic diagram of the rotor structure of the present invention.

In the figure: pump body 10, inlet pipe 101, outlet pipe 102, (centrifugal) impeller 20, filter 30, casing 301, filter cartridge 302, outlet joint 303, connecting flange 304, (graphite) bearing 40, spiral groove 401 , stator 50, stator shielding sleeve 501, stator blades 502, rotor 60, rotating shaft 601, rotor shielding sleeve 602, rotor blades 603, circulation pipe 70, secondary cleaning device 80, outer cylinder 801, lining cylinder 802, fixed helical blades 803, moving helical blade 804, first communication hole 805, second communication hole 806, accommodating groove 807, impurity discharge pipe 808, small auxiliary pump 809, end cap 810, fiber probe 90, particle concentration detector 901, flow direction " →”.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in 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. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1-6, an anti-jamming canned pump includes a pump body 10, a centrifugal impeller 20, a filter 30, a bearing 40, a stator 50, a rotor 60, a circulation pipe 70, a secondary cleaning device 80, a pump The body 10 has an inlet pipe 101 and an outlet pipe 102. A centrifugal impeller 20 is installed in the pump cavity of the pump body 10. A filter 30 is connected to the outlet pipe 102. The other end is connected to the secondary cleaning device 80 . The motor between the pump body 10 and the secondary cleaning device 80 includes a stator 50 and a rotor 60 . There is a rotor shielding sleeve 602, 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 and the stator The cavities are isolated by the stator shielding sleeve 501, and it is characterized in that: the secondary cleaning device 80 includes an outer cylinder 801, an inner lining cylinder 802, a fixed helical blade 803, a moving helical blade 804, a first communication hole 805, and a second communication hole 806 , accommodating groove 807, the inner liner 802 is connected to the inner peripheral wall of the outer cylinder 801, the end flange of the outer cylinder 801 is connected with the end of the motor, and the inner peripheral wall of the inner liner 802 is provided with a fixed helical blade 803, The outer circumference of the rotating shaft 601 is provided with a moving helical blade 804, and the moving helical blade 804 and the fixed helical blade 803 are alternately/spaced. The communication hole 805 , the second communication hole 806 , the first communication hole 805 and the second communication hole 806 are respectively communicated with the receiving groove 807 .

Further, the outer peripheral wall of the outer cylinder 801 is connected with an impurity discharge pipe 808, one end of the impurity discharge pipe 808 is communicated with the accommodating tank 807, and the other end of the impurity discharge pipe 808 is connected with the small auxiliary pump 809. Under the action, the impurity discharge pipe 808 is used to discharge the impurity particles accumulated in the accommodating groove 807 .

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 matches the second conical surface, and the right end of the outer cylinder 801 is connected with a The end cap 810, the other end of the end cap 810 is connected to the circulation pipe 70. The outer peripheral wall of the inner liner 802 and the inner peripheral wall of the outer cylinder 801 are taperedly matched, which can prevent the solid particles from jamming, and the inner liner 802 can be easily taken out for cleaning.

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 805 is inclined or spirally arranged, the second communication hole 806 is inclined or spirally arranged, and the first communication hole 805 is arranged obliquely or spirally. The hole 805 and the second communication hole 806 are arranged adjacent to each other. The first communication hole 805 and the second communication hole 806 have opposite inclination directions or helical directions. It is easy to enter the first communication hole 805 and the accommodating groove 807; under the centrifugal screw conveying action of the moving helical blade 804 and the fixed helical 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 pump The backflow of the medium is sent, 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, under the centrifugal helical conveyance of the moving helical blades 804 and the fixed helical blades 803, the liquid will start to rotate along the helical blades, and the quality Larger solid particles will be thrown onto the inner wall of the inner liner 802 due to the centrifugal force, and enter the first communication hole 805 and the accommodating groove 807 as the liquid rotates, so that the solid particles in the pumping medium entering the rotor cavity are greatly reduced. It is more difficult to cause wear and jamming when passing through the gap between the stator shielding sleeve 501 and the rotor shielding sleeve 602 .

Further, an optical fiber probe 90 is arranged in the rotor cavity of the motor. One end of the optical fiber probe 90 extends into the gap between the rotor shielding sleeve 602 and the stator shielding sleeve 501 , and the other end is connected to the particle concentration detector 901 . The optical fiber probe 90 can measure the voltage change caused by the change of the particle concentration in the gap, so as to monitor the particle concentration in the gap in real time through the particle concentration detector 901 .

Further, the filter 30 includes a housing 301, a filter cartridge 302, an outlet joint 303, and a connecting flange 304. The filter cartridge 302 is arranged in the housing 301, and an annular space/annular space is provided between the filter cartridge 302 and the housing 301. The housing 301 The upper and lower ends of the casing 301 are respectively provided with connecting flanges 304, the outer peripheral wall of the casing 301 is provided with an outlet joint 303, the outlet joint 303 is connected with the circulation pipe 70, and the filter 30 is used to filter the pumping medium. The filter cartridge 302 is installed in the casing 301 through the step at the lower end, which is convenient for installation/replacement. The pumped medium passes through the filter cartridge 302 into the annular space and then flows into the circulation line 70 .

Further, the inner peripheral walls of the (graphite) first bearing 40 and the second bearing 40 are provided with spiral grooves 401, and the spiral grooves 401 are used for directional flow of the pumping medium, as shown by the arrow "←" in FIG. 1 .

Further, the inner peripheral wall of the stator shielding sleeve 501 is provided with one or more stator vanes 502, the stator vanes 502 extend in the axial direction, and the cross-section of the stator vanes 502 is an inverted triangle, which can avoid the accumulation of impurity particles at the bottom, and provide the rotor and the stator A reaction force between the solid particles in the gap.

Further, the outer peripheral wall of the rotor shielding sleeve 602 is provided with rotor blades 603, the rotor blades 603 extend in a spiral shape, and the cross-section of the rotor blades 603 is arc or semicircle, which can avoid the accumulation of impurity particles at the bottom, while the rotor blades 603 Rotation provides the driving force to rapidly move the particles through the gap between the rotor and stator.

When the rotor blades 603 on the rotor shielding sleeve 602 rotate, a force F2 perpendicular to the rotor blades 603 will be given to the solid particles in the gap, and the stator blades 502 will give the solid particles a reaction force F1, and the resultant force of the two forces will act on the solid particles. Provide a forward driving force F;

where F=(m×n×2πR×cosθ-Q/A)/60; where m is the mass of the particles, n is the rotational speed, and R is the distance between the position of the particles and the center of the rotating shaft 601, and the numerical part can be used for design/calculation /Calculation; The size of the driving force on the particles can be adjusted by adjusting the rotational speed, θ is the helix angle of the rotor blade 603, Q is the unit flow of the coolant, and A is the gap area between the rotor and the stator;

where θ=arctan(L/2πR), A=π(R ₁ −R ₂ ) ² ;

Among them, L is the length of the rotor shielding sleeve 602, R1 is the radius _of the stator shielding sleeve, and R2 is the radius of the rotor shielding sleeve _; the numerical part can be used for design/calculation during design/calculation.

A control method for an anti-jamming canned pump, comprising:

(1) Turn on the shield pump, input the liquid from the inlet pipe 101, and output the liquid from the outlet pipe 102 to the filter 30 after the centrifugal impeller 20 rotates. After filtering through the filter 30, the primary cleaning medium enters between the filter cartridge 302 and the housing 301. Then, the liquid is transported to the secondary cleaning device 80 through the circulation pipe 70, and the liquid is accelerated by the centrifugal screw conveying action of the moving screw blade 804 and the fixed screw blade 803, and the solid particles are accelerated. The liquid is thrown to the inner wall of the liner cylinder 802 by the centrifugal force, and enters the accommodating groove 807 through the first communication hole 805, while the liquid is returned/discharged through the second communication hole 806, and passes through the spiral groove on the inner peripheral side of the second bearing 400. Enter the rotor cavity to lubricate/cool the second bearing/graphite bearing 40; after the pumped medium passes through the rotor cavity, it enters the pump cavity of the pump body 10 through the spiral groove on the inner circumference of the first bearing 40 again to realize the repetition of the medium use;

(2) When 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 the liquid to flow, and the stator blades 502 on the stator shielding sleeve are shielded from the rotor. The rotor blades 603 on the sleeve work together to give the solid particles a driving force to quickly pass through the gap; the fiber optic probe 90 in the gap can monitor the particle concentration in the gap in real time. At this time, the driving force acting on the solid particles becomes larger, so that the solid particles accelerate through the gap;

(3) The small auxiliary pump 809 is periodically turned on. Under the action of the small auxiliary pump 809, the impurity discharge pipe 808 is used to discharge the impurity particles accumulated in the accommodating groove 807; the accommodating groove 807 can also be provided with an optical fiber probe 90, It is used to detect the particle concentration. When the particle concentration exceeds the threshold, it means that there is abnormal discharge of impurity particles. At this time, it is necessary to disassemble the inner liner 802 for maintenance/cleaning.

The anti-jamming shielded pump and the control method thereof of the present invention can reduce the solid impurity particles in the cooling liquid, promote the rapid passage of the solid impurity particles through the gap between the shielding sleeves, and can collect the impurity particles through the secondary cleaning device, thereby reducing the The risk of jamming of the shielding sleeve of the canned pump extends the service life of the canned pump.

The above-mentioned embodiment is an illustration of the present invention, not a limitation of the present invention. It can be understood that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The protection scope of the present invention It is defined by the appended claims and their equivalents.

Claims (9)

1. An anti-jamming canned pump, comprising a pump body (10), a centrifugal impeller (20), a filter (30), a bearing (40), a stator (50), a rotor (60), and a circulation pipe (70) , a secondary cleaning device (80), the pump body has an inlet pipe (101), an outlet pipe (102), a centrifugal impeller is installed in the pump cavity of the pump body, a filter is connected to the outlet pipe, and the outer peripheral side of the filter is connected to A circulating pipe, the other end of the circulating pipe is connected with the secondary cleaning device, the motor between the pump body and the secondary cleaning device includes a stator and a rotor, the inner peripheral side of the stator is provided with a stator shielding sleeve (501), and the outer peripheral side of the rotor is provided with a stator shielding sleeve (501). A rotor shielding sleeve (602) is arranged, a rotating shaft (601) is installed in the center of the rotor, a first bearing is arranged between the pump cavity and the rotor cavity, a second bearing is arranged between the rotor cavity and the secondary cleaning device, and the rotor cavity is connected to the rotor cavity. The stator cavities are isolated by a stator shield sleeve, and it is characterized in that: the secondary cleaning device (80) includes an outer cylinder (801), an inner liner (802), a fixed helical blade (803), a moving helical blade (804), a first A communication hole (805), a second communication hole (806), and an accommodating groove (807), the inner liner is connected to the inner peripheral wall of the outer cylinder, the end flange of the outer cylinder is connected to the end of the motor, and the inner liner is connected to the inner peripheral wall of the outer cylinder. The inner peripheral wall of the liner is provided with fixed helical blades, the outer periphery of the rotating shaft is provided with moving helical blades, the moving helical blades and the fixed helical blades are arranged alternately/spaced, the inner peripheral wall of the outer cylinder is provided with one or more accommodating grooves, and the inner lining cylinder is provided with a moving helical blade. A first communication hole and a second communication hole are provided, and the first communication hole and the second communication hole are respectively communicated with the accommodating groove. 2. The anti-jamming canned pump according to claim 1, wherein an impurity discharge pipe (808) is connected to the outer peripheral wall of the outer cylinder (801), and one end of the impurity discharge pipe is connected to the accommodating groove (807). ) is connected, and the other end of the impurity discharge pipe is connected with a small auxiliary pump (809). Under the action of the small auxiliary pump, the impurity discharge pipe is used to discharge the impurity particles accumulated in the holding tank. 3. The anti-jamming canned pump according to claim 2, wherein the inner peripheral wall of the outer cylinder (801) is a first conical surface, and the outer peripheral wall of the inner lining cylinder (802) is a second The conical surface, the first conical surface matches the second conical surface, the right end of the outer cylinder is connected with an end cap (810), and the other end of the end cap is connected with the circulation pipe (70). 4. The anti-jamming canned pump according to claim 3, wherein 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 inclined or spirally arranged, the second communication hole is inclined or spirally arranged, the first communication hole is adjacent to the second communication hole, and the inclination direction or spiral direction of the first communication hole and the second communication hole is opposite, The diameter of the first communication hole is larger than that of the second communication hole, so that the solid particles can more easily enter the first communication hole and the accommodating groove; under the centrifugal screw conveying action of the moving helical blade and the fixed helical blade, the impurity particles pass through the first communication hole Entering the holding tank, the second communication hole is used for the backflow of the pumping medium, but the impurity particles cannot pass through the second communication hole. 5. The anti-jamming shielded pump according to claim 4, wherein an optical fiber probe (90) is arranged in the rotor cavity of the motor, and one end of the optical fiber probe (90) extends into the rotor shielding sleeve and the rotor shielding sleeve. In the gap between the stator shielding sleeves, the other end is connected to the particle concentration detector (901); the optical fiber probe can measure the voltage change caused by the change of particle concentration in the gap, so as to monitor the particle concentration detector in real time through the particle concentration detector. particle concentration. 6. An anti-jamming canned pump according to claim 5, characterized in that, the filter (30) comprises a housing (301), a filter cartridge (302), an outlet joint (303), a connecting flange ( 304), the filter cartridge is arranged in the outer casing, an annular space is arranged between the filter cartridge and the outer casing, the upper and lower ends of the outer casing are respectively provided with connecting flanges, the outer peripheral wall of the outer casing is provided with an outlet joint, and the outlet joint is connected with the circulation pipe, The filter cartridge is installed in the housing through the step at the lower end, and the filter is used to filter the pumping medium. 7 . The anti-jamming canned pump according to claim 6 , wherein the inner peripheral walls of the first bearing and the second bearing are provided with spiral grooves ( 401 ), and the spiral grooves are used to generate the pumping medium. 8 . directional flow. 8. The anti-jamming canned pump according to claim 7, wherein the inner peripheral wall of the stator shielding sleeve (501) is provided with one or more stator vanes (502), and the stator vanes extend in the axial direction , the cross section of the stator blade is an inverted triangle, which can avoid the accumulation of impurity particles at the bottom and give a reaction force to the solid particles in the gap between the rotor and the stator; the outer peripheral wall of the rotor shielding sleeve (602) is provided with rotor blades (603) , The rotor blade extends in a spiral shape, and the cross section of the rotor blade is arc-shaped, which can avoid the accumulation of impurity particles at the bottom, and at the same time, the rotation of the rotor blade can provide a driving force, so that the particles can quickly pass through the gap between the rotor and the stator. 9. the control method of a kind of anti-jamming canned pump as claimed in claim 8, it comprises: (1) Turn on the canned pump, input the liquid from the inlet pipe, and output it from the outlet pipe to the filter after the centrifugal impeller rotates. After filtering through the filter, the primary cleaning medium enters the annular space between the filter cartridge and the casing, and passes through The outlet joint is discharged; then it is transported to the secondary cleaning device through the circulation pipe. The liquid accelerates the solid particles under the centrifugal helical conveying action of the moving helical blades and the fixed helical blades, and the solid particles are thrown to the inner wall of the lining cylinder by the centrifugal force. And enter the accommodating groove through the first communication hole, and the liquid flows back/discharge through the second communication hole, and enters the rotor cavity through the spiral groove on the inner peripheral side of the second bearing to lubricate/cool the second bearing; pumping medium After passing through the rotor cavity, it enters the pump cavity of the pump body through the spiral groove on the inner peripheral side of the first bearing again to realize the reuse of the medium; (2) When the filtered medium enters the gap between the stator shielding sleeve and the rotor shielding sleeve, the rotor blades on the rotor shielding sleeve rotate to drive the liquid to flow, and the stator blades on the stator shielding sleeve and the rotor on the rotor shielding sleeve rotate. The blades work together to give the solid particles a driving force to quickly pass through the gap; the fiber optic probe in the gap can monitor the particle concentration in the gap in real time. When the particle concentration exceeds the threshold, by increasing the speed of the motor rotor, it acts on the The driving force on the solid particles becomes larger, which accelerates the solid particles through the gap; (3) Turn on the small auxiliary pump regularly. Under the action of the small auxiliary pump, the impurity discharge pipe is used to discharge the impurity particles accumulated in the holding tank; the holding tank is also provided with an optical fiber probe to detect the particle concentration. When the concentration exceeds the threshold, it means that there is abnormal discharge of impurity particles. At this time, the inner liner needs to be disassembled for maintenance or cleaning.

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