CN201412357Y - Self-balancing magnetic pump - Google Patents

Self-balancing magnetic pump Download PDF

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Publication number
CN201412357Y
CN201412357Y CN2009201080417U CN200920108041U CN201412357Y CN 201412357 Y CN201412357 Y CN 201412357Y CN 2009201080417 U CN2009201080417 U CN 2009201080417U CN 200920108041 U CN200920108041 U CN 200920108041U CN 201412357 Y CN201412357 Y CN 201412357Y
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CN
China
Prior art keywords
pump
bearing block
balance
thrust
balancing
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.)
Expired - Fee Related
Application number
CN2009201080417U
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Chinese (zh)
Inventor
刘东方
杨波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Yanhua Zhegbang Equipment Overhaul Co Ltd
Original Assignee
Beijing Yanhua Zhegbang Equipment Overhaul Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Yanhua Zhegbang Equipment Overhaul Co Ltd filed Critical Beijing Yanhua Zhegbang Equipment Overhaul Co Ltd
Priority to CN2009201080417U priority Critical patent/CN201412357Y/en
Application granted granted Critical
Publication of CN201412357Y publication Critical patent/CN201412357Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a self-balancing magnetic pump, which comprises a front sealing gland, a front bearing bush seat, a back bearing bush seat, a pump body, a first-stage impeller, a second-stage impeller, a pump cover, an inner magnetic rotor, an outer magnetic rotor, an outer magnetic rotor outside seat, a centering cylinder, a bearing, a shaft sleeve, a motor, a pressure plate, a seal cover, a pump shaft, a balancing plate, a balancing disc, an anti-thrust stationary ring and an anti-thrust movable ring; the balancing plate, the balancing disc, the pump shaft, the anti-thrust stationary ring and the anti-thrust movable ring constitute an axial-force balancing device; and the pump shaft adopts a double-bracing structure. The fluid entering the axial-force balancing device is ledout through a pump outlet, flows into the seal cover through an oblique hole formed on a bearing bush seat, and flows out of the front sealing gland through a central hole formed on the pump shaft; the whole structure of the self-balancing magnetic pump adopts the radial double-bracing structure, thereby resulting in reasonable structure, lower manufacturing cost of the pump, torsion and bending deformation amount reduction, and stability improvement for pump operation; and when the flow rate of the pump is changed in the effective range, the axial force changes, the axial-force balancing device of the pump is used to adjust and balance the axial force by self, and the using range of the pump is expanded.

Description

The self-balancing type magnetic drive pump
Technical field
The utility model is specifically related to a kind of self-balancing type magnetic drive pump, belongs to the magnetic drive pump technical field.
Background technique
Magnetic drive pump is made up of pump, magnetic driver, motor three parts.The critical component magnetic driver is made up of outer magnet rotor, interior magnet rotor and non-magnetic separation sleeve.When magnet rotor outside the motor drives rotated, magnetic field energy penetrated air gap and namagnetic substance, drove the interior magnet rotor that links to each other with impeller and did rotation synchronously, and the non contact transmission of realization power is converted into static seal with motive sealing.Because pump shaft, interior magnet rotor are by the pump housing, separation sleeve complete closed, thereby thoroughly solved " run, drip, leak " problem, eliminated that the oil-refining chemical industry is inflammable, explosive, poisonous, hazardous medium is by the potential safety hazard that pump seal leaks, and effectively guaranteed worker's physically and mentally healthy and safety in production.
The axial force balance of existing magnetic force driven centrifugal pump adopts choma is set on the impeller mostly, opens the method for equalizing orifice.The employing that also has is opened equalizing orifice and the coefficient method of thrust dynamic and static ring is set, or Balance disc is set behind impeller.Its shortcoming be (1) only open the equalizing orifice axial force can not be by complete equilibrium, especially for magnetic drive pump, axial movement value is excessive, can cause the decrease in efficiency of magnetic transmission.(2) adopt the method for opening equalizing orifice and setting up the thrust dynamic and static ring, the thrust dynamic and static ring needs often to change.Wear extent is big.(3) Balance disc is set, to the designing requirement strictness of Balance disc, the axial clearance of balance set, the radial clearance of Balance disc etc. all needs through accurate Calculation.And inconvenience is adjusted when experiment.
Summary of the invention
The utility model purpose be for solve on the magnetic drive pump pump shaft return port is set and cause that pump shaft intensity descends, the nonadjustable problem of radial clearance in the Equilibrator, a kind of self-balancing type magnetic drive pump is provided, the utility model has been cancelled return port, changes backflow road Jing; Directly the liquid that comes in the balance cylinder is drawn by the magnetic drive pump outlet, regulate the size of rate of discharge, and then reach the purpose of regulating radial clearance.
A kind of self-balancing type magnetic drive pump, comprise preceding sealing gland, fore bearing block set, the pump housing, sencond stage impeller, one-level impeller, pump cover, rear bearing block set, interior magnet rotor, outer magnet rotor, the outer seat of outer magnet rotor, centering tube, bearing, axle sleeve, motor, platen, seal closure, pump shaft, balance plate, Balance disc, thrust stationary ring and thrust rotating ring; Preceding sealing cover is connected with bolt with the fore bearing block set, sencond stage impeller and one-level impeller are separately fixed on the pump shaft between fore bearing block set and the pump cover, pump cover is fixed on the pump shaft, adopt bolt to be connected with the pump housing, the pump housing covers on one-level impeller and sencond stage impeller periphery, the front end of the described pump housing and fore bearing block set bolt, and the rear end connects pump cover, bearing is embedded in respectively on fore bearing block set and the rear bearing block set, and axle sleeve is fixed on the pump shaft; Seal closure is fixed on rear bearing block set rear, be static seal between seal closure and the rear bearing block set, platen is connected the seal closure periphery, interior magnet rotor is fixed on the pump shaft end, outer magnet rotor adopts bolt to be connected with the outer seat of outer magnet rotor, the outer seat of outer magnet rotor adopts key to be connected with motor, and the flange plate at the two ends of centering tube is connected with the platen bolt with motor respectively; The pump shaft two ends are by fore bearing block set and rear bearing block set radial support, described Balance disc is fixed between thrust stationary ring and the thrust rotating ring, Balance disc, thrust stationary ring and thrust rotating ring fixed cover are on pump shaft, balance plate is positioned at thrust rotating ring rear, be fixed on the rear bearing block set, Compositional balance chamber, space between pump cover and the Balance disc, balance plate has an axial hole, rear bearing block set circumferencial direction one side has inclined hole, opposite side has pod apertures, inclined hole one end connects the balance cylinder, the other end connects the space between seal closure and the pump shaft, pod apertures connects the axial hole of pump discharge and balance plate, by the gap between balance plate and the Balance disc, makes pump discharge communicate with the balance cylinder; There is center hole at the pump shaft center, and an end of center hole is connected inclined hole by seal closure with space between the pump shaft, communicates with the balance cylinder, and the other end communicates with pump intake by the space between fore bearing block set and the preceding sealing cover.
Described balance plate, Balance disc, pump shaft, thrust stationary ring and thrust rotating ring are formed axial thrust balancing devices, the axial force that the equilibrant that described axial thrust balancing devices produces by the balance cylinder comes the balancing magnetic force pump.
The inclined hole of the medium that described Balance disc earial drainage comes out on the rear bearing block set flows in the seal closure, give the interior magnet rotor cooling of high speed rotating, cooling liquid is before the center hole of pump shaft flows in the sealing gland, get back to pump intake at last, a part of medium in the center hole is given bearing lubrication by the guiding gutter on the bearing.
Outer magnet rotor and interior magnet rotor all adopt the plug-type magnetic circuit of combination, and magnet steel is arranged as 18 utmost points, and two row are closely arranged, and at the two ends of magnet steel the metal isolation pad are set all.
Advantage of the present utility model is:
(1) the pump overall structure adopts radially dual-gripper, and is rational in infrastructure, and the manufacture cost of pump has obtained effectively reducing, and reverse and the bending deformation quantity of pump shaft reduce, and have improved the stability of pump operation;
(2) when the flow of pump changed in effective coverage, axial force also changed, and the axial thrust balancing devices that relies on self is the adjustment axial force voluntarily, enlarged the using scope of pump.
Description of drawings
Fig. 1 is a magnetic drive pump structure erection drawing of the present utility model;
Fig. 2 is an axial force automatic balancing of the present utility model mechanism;
Fig. 3 is a balanced controls medium pressure distribution situation schematic representation in the utility model;
Fig. 4 is that magnetic shaft coupling magnet steel of the present utility model is arranged schematic representation;
Magnet rotor in the outer magnet rotor 4-of the outer seat of the outer magnet rotor of 1-2-centering tube 3-
5-seal closure 6-rear bearing block set 7-balance plate 8-Balance disc
9-pump cover 10-one-level impeller 11-sencond stage impeller 12-fore bearing block set
The sealing gland 14-bearing 15-axle sleeve 16-pump housing before the 13-
17-thrust stationary ring 18-thrust rotating ring 19-platen 20-pump shaft
The 21-motor 22-23-of balance cylinder through hole 24-inclined hole
25-pod apertures 26-center hole 27-pump discharge 28-pump intake
29-metallic shim 30-magnet steel 31-gap
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
The utility model is a kind of self-balancing type magnetic drive pump, as shown in Figure 1, comprise preceding sealing gland 13, fore bearing block set 12, the pump housing 16, sencond stage impeller 11, one-level impeller 10, pump cover 9, rear bearing block set 6, interior magnet rotor 4, outer magnet rotor 3, the outer seat 1 of outer magnet rotor, centering tube 2, bearing 14, axle sleeve 15, motor 21, platen 19, seal closure 5, balance plate 7, Balance disc 8, thrust stationary ring 17, thrust rotating ring 18 and pump shaft 20.
Axial thrust balancing devices comprises balance plate 7, Balance disc 8, thrust stationary ring 17, thrust rotating ring 18, pump shaft 20.
Preceding sealing cover 13 is connected with fore bearing block set 12 usefulness bolts, pump shaft 20 two ends are by fore bearing block set 12 and rear bearing block set 6 radial support, sencond stage impeller 11 and one-level impeller 10 are separately fixed on the pump shaft 20 between fore bearing block set 12 and the pump cover 9, pump cover 9 is fixed on the pump shaft 20, adopt bolt to be connected with the pump housing 16, the pump housing 16 covers on one-level impeller 10 and sencond stage impeller 11 peripheries, the front end of the described pump housing 16 and fore bearing block set 12 are used bolt, the rear end connects pump cover 9, bearing 14 is embedded in respectively on fore bearing block set 12 and the rear bearing block set 6, pump shaft 20 is played a supportive role, and axle sleeve 15 is fixed on the pump shaft 20, strengthens the wear resistance of pump shaft 20.
Axial thrust balancing devices is between pump cover 9 and rear bearing block set 6, and seal closure 5 is fixed on rear bearing block set 6 rears, is static seal between seal closure 5 and the rear bearing block set 6, and the assurance medium can not revealed.Platen 19 is connected seal closure 5 peripheries, is used for fixing seal closure 5.Interior magnet rotor 4 is fixed on pump shaft 20 ends, outer magnet rotor 3 adopts bolt to be connected with the outer seat 1 of outer magnet rotor, the outer seat 1 of outer magnet rotor adopts key to be connected with motor 21, and described outer magnet rotor 3, the outer seat 1 of outer magnet rotor and motor 21 constitute driving mechanism, magnet rotor 4 rotations in driving by magnetic force.The flange plate at the two ends of centering tube 2 is connected with platen 19 with motor 21 respectively, and fit system adopts the seam interference fit, has just saved the link of centering like this when assembling, has guaranteed the centering requirement of inside and outside magnet rotor 4 again.
Described axial thrust balancing devices, as shown in Figure 2, Balance disc 8 is fixed between thrust stationary ring 17 and the thrust rotating ring 18, Balance disc 8, thrust stationary ring 17 and thrust rotating ring 18 fixed covers are on pump shaft 20, thrust stationary ring 17 and thrust rotating ring 18 are used for axial limiting Balance disc 8, balance plate 7 is positioned at thrust rotating ring 18 rears, is fixed on the rear bearing block set 6 the Compositional balance chamber, space 22 between pump cover 9 and the Balance disc 8.
Balance plate 7 has an axial hole 23, rear bearing block set 6 circumferencial directions one side has inclined hole 24, opposite side has pod apertures 25, as shown in Figure 3, inclined hole 24 1 ends connect balance cylinder 22, and the other end connects the space between seal closure 5 and the pump shaft 20, and pod apertures 25 connects the axial hole 23 of pump discharge 27 and balance plate 7, by the gap between balance plate and the Balance disc 31, make pump discharge 27 communicate with balance cylinder 22.There is center hole 26 at pump shaft 20 centers, be used as balance tube, an end of center hole 26 is connected inclined hole 24 by seal closure 5 with space between the pump shaft 20, communicates with balance cylinder 22, the other end communicates with pump intake 28 by the space between fore bearing block set 12 and the preceding sealing cover 13.
Balance disc more than 8 is used for the sectional type multistage pump, after being contained in impeller, rotate with rotor, the utility model is with after being seated in one-level impeller 10 behind the Balance disc 8, make pump structure compact more, the layout of balance tube is more reasonable, two gaps are arranged in the axial thrust balancing devices, as shown in Figure 3, one is the radial clearance that Balance disc 8 and pump cover 9 form, described radial clearance size flows into the flow of pod apertures 25 media by adjusting and the size of pressure realizes, another is the axial clearance 31 that forms between Balance disc 8 and the balance plate 7.
Balance cylinder 22 communicates with pump intake 28 by the center hole 26 of the inclined hole on the rear bearing block set 6 24 through pump shaft 20, communicate with pump discharge 27 by the axial hole 23 of balance plate 7 and the pod apertures 25 of rear bearing block set 6, the pressure P 1 of pump discharge 27 as shown in Figure 3, pod apertures 25 on the process rear bearing block set 6 and the axial hole 23 on the balance plate 7 enter the cavity between Balance disc 8 and the balance plate 7, pressure is reduced to P2, reduce to P3 again through axial clearance 31 pressure afterwards, pressure in the balance cylinder 22 is P3, through the inclined hole 24 on the rear bearing block set 6, pressure is reduced to P4 again.Because P2 is greater than P3, its pressure reduction produces equilibrant on Balance disc 8, and described equilibrant is used for balanced action at pump shaft 20, and direction is pointed to the axial force of motor.Balance disc 8 is to reveal the pressure reduction work that produces by medium, and not revealing does not just have equilibrant yet.
The described axial force that acts on pump shaft 20 mainly consists of the following components: the actuating pressure during (1) fed sheet of a media on one-level impeller 10 and sencond stage impeller 11 front and rear cover plates does not wait the pressure difference that forms; (2) power that causes of interior magnet rotor 4 left and right sides both ends of the surface pressure differences; (3) dynamical reaction that produces through impeller 10 and sencond stage impeller 11 of MEDIA FLOW, the three is synthetic to have constituted the axial force of impelling pump shaft 20 to move.When axial force during greater than equilibrant, pump shaft 20 is to motor 21 side shiftings, and the gap that balance plate 7 and Balance disc are 8 dwindles, and vent flow reduces, and the pressure in the balance cylinder 22 rise, and pressure difference increases, and equilibrant increases, up to equating that with axial force pump shaft 20 is no longer mobile.When equilibrant during greater than axial force, pump shaft 20 is to the pump housing 16 side shiftings, and balance plate 7 and Balance disc 8 gaps increase, vent flow increases, and the pressure in the balance cylinder 22 descends, and pressure difference reduces, equilibrant reduces, and until equating with axial force, thereby reaches the effect of a transient equiliblium.When the flow of pump changed, axial force also changed, and simultaneously, the high-pressure medium of drawing from pump discharge 27 also corresponding variation can take place, and equilibrant also follows suit and adjusts accordingly, thereby reaches a kind of self balancing effect.
The enforcement of lubricated coolant flow channel: the inclined hole 24 of medium on rear bearing block set 6 that is come out by Balance disc 8 earial drainages flows in the seal closure 5, give interior magnet rotor 4 coolings of high speed rotating, cooling liquid in the sealing gland 13, is got back to pump intake 28 at last before the center hole 26 of pump shaft 20 flows into.A part of medium in the center hole 26 gives bearing 14 lubricated by the guiding gutter on the bearing 14, and the structure of described axial thrust balancing devices both can balancing axial thrust, again can be as the usefulness of lubricated and cooling.
The magnetic circuit of outer magnet rotor 3 and interior magnet rotor 4 is arranged, as shown in Figure 4, comprises metallic shim 29 and magnet steel 30, and the magnetic circuit of outer magnet rotor 3 and interior magnet rotor 4 all adopts the plug-type magnetic circuit of combination, and magnet steel 30 is arranged as 18 utmost points, and two row are closely arranged.For preventing leakage field, metallic shim 29 all is set at the two ends of magnet steel 30.

Claims (3)

1, the self-balancing type magnetic drive pump, comprise preceding sealing gland, the fore bearing block set, the pump housing, sencond stage impeller, the one-level impeller, pump cover, the rear bearing block set, interior magnet rotor, outer magnet rotor, the outer seat of outer magnet rotor, the centering tube, bearing, axle sleeve, motor, platen, seal closure, pump shaft, preceding sealing cover is connected with bolt with the fore bearing block set, sencond stage impeller and one-level impeller are separately fixed on the pump shaft between fore bearing block set and the pump cover, pump cover is fixed on the pump shaft, adopt bolt to be connected with the pump housing, the pump housing covers on one-level impeller and sencond stage impeller periphery, the front end of the described pump housing and fore bearing block set bolt, the rear end connects pump cover, bearing is embedded in respectively on fore bearing block set and the rear bearing block set, and axle sleeve is fixed on the pump shaft; Seal closure is fixed on rear bearing block set rear, be static seal between seal closure and the rear bearing block set, platen is connected the seal closure periphery, interior magnet rotor is fixed on the pump shaft end, outer magnet rotor adopts bolt to be connected with the outer seat of outer magnet rotor, the outer seat of outer magnet rotor adopts key to be connected with motor, and the flange plate at the two ends of centering tube is connected with the platen bolt with motor respectively, it is characterized in that:
This self-balancing type magnetic drive pump also comprises balance plate, Balance disc, thrust stationary ring and thrust rotating ring; The pump shaft two ends are by fore bearing block set and rear bearing block set radial support, described Balance disc is fixed between thrust stationary ring and the thrust rotating ring, Balance disc, thrust stationary ring and thrust rotating ring fixed cover are on pump shaft, balance plate is positioned at thrust rotating ring rear, be fixed on the rear bearing block set, Compositional balance chamber, space between pump cover and the Balance disc, balance plate has an axial hole, rear bearing block set circumferencial direction one side has inclined hole, opposite side has pod apertures, inclined hole one end connects the balance cylinder, the other end connects the space between seal closure and the pump shaft, pod apertures connects the axial hole of pump discharge and balance plate, by the gap between balance plate and the Balance disc, makes pump discharge communicate with the balance cylinder; There is center hole at the pump shaft center, and an end of center hole is connected inclined hole by seal closure with space between the pump shaft, communicates with the balance cylinder, and the other end communicates with pump intake by the space between fore bearing block set and the preceding sealing cover.
2, self-balancing type magnetic drive pump according to claim 1, it is characterized in that: described balance plate, Balance disc, pump shaft, thrust stationary ring and thrust rotating ring are formed axial thrust balancing devices, the axial force that the equilibrant that described axial thrust balancing devices produces by the balance cylinder comes the balancing magnetic force pump.
3, self-balancing type magnetic drive pump according to claim 1, it is characterized in that: the inclined hole of the medium that described Balance disc earial drainage comes out on the rear bearing block set flows in the seal closure, give the interior magnet rotor cooling of high speed rotating, cooling liquid is before the center hole of pump shaft flows in the sealing gland, get back to pump intake at last, a part of medium in the center hole is given bearing lubrication by the guiding gutter on the bearing.
CN2009201080417U 2009-05-21 2009-05-21 Self-balancing magnetic pump Expired - Fee Related CN201412357Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201080417U CN201412357Y (en) 2009-05-21 2009-05-21 Self-balancing magnetic pump

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Application Number Priority Date Filing Date Title
CN2009201080417U CN201412357Y (en) 2009-05-21 2009-05-21 Self-balancing magnetic pump

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CN201412357Y true CN201412357Y (en) 2010-02-24

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102200143A (en) * 2010-03-23 2011-09-28 襄樊五二五泵业有限公司 Thrust structure of high-power magnetic drive pump
CN102913452A (en) * 2012-09-12 2013-02-06 上海凯泉泵业(集团)有限公司 First-stage positive-symmetric double-suction segment type multi-stage centrifugal pump
CN102996496A (en) * 2012-11-20 2013-03-27 锦州重型水泵有限公司 Self-balancing self-positioning energy-saving multi-stage water pump
CN103306986A (en) * 2012-03-05 2013-09-18 株式会社荏原制作所 Multi-stage pump
CN105041668A (en) * 2015-08-05 2015-11-11 芜湖环球汽车配件有限公司 Magnetic pump
CN105987006B (en) * 2015-02-04 2019-03-26 昆山江津长抗干磨磁力泵有限公司 A kind of magnetic force middle-opening pump of corrosion-resistant anti-dry grinding
CN110274028A (en) * 2019-05-20 2019-09-24 清华大学 A kind of magnetic coupling transmission device for sealing magnetic fluid

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102200143A (en) * 2010-03-23 2011-09-28 襄樊五二五泵业有限公司 Thrust structure of high-power magnetic drive pump
CN103306986A (en) * 2012-03-05 2013-09-18 株式会社荏原制作所 Multi-stage pump
CN103306986B (en) * 2012-03-05 2017-03-01 株式会社荏原制作所 Multistage pump
CN102913452A (en) * 2012-09-12 2013-02-06 上海凯泉泵业(集团)有限公司 First-stage positive-symmetric double-suction segment type multi-stage centrifugal pump
CN102996496A (en) * 2012-11-20 2013-03-27 锦州重型水泵有限公司 Self-balancing self-positioning energy-saving multi-stage water pump
CN102996496B (en) * 2012-11-20 2014-12-24 锦州重型水泵有限公司 Self-balancing self-positioning energy-saving multi-stage water pump
CN105987006B (en) * 2015-02-04 2019-03-26 昆山江津长抗干磨磁力泵有限公司 A kind of magnetic force middle-opening pump of corrosion-resistant anti-dry grinding
CN105041668A (en) * 2015-08-05 2015-11-11 芜湖环球汽车配件有限公司 Magnetic pump
CN110274028A (en) * 2019-05-20 2019-09-24 清华大学 A kind of magnetic coupling transmission device for sealing magnetic fluid

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100224

Termination date: 20130521