CN1704611A - Anti-pumping off magnetic pump - Google Patents
Anti-pumping off magnetic pump Download PDFInfo
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- CN1704611A CN1704611A CN 200410044377 CN200410044377A CN1704611A CN 1704611 A CN1704611 A CN 1704611A CN 200410044377 CN200410044377 CN 200410044377 CN 200410044377 A CN200410044377 A CN 200410044377A CN 1704611 A CN1704611 A CN 1704611A
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- pump
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- bearing housing
- inlet valve
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Abstract
This invention relates to an anti-exhausting magnetic pump, characterized in that the pump body, bearing box, magnetic sealing driver and motor are connected sequentially, using pump liquid to cool and lubricate the separation sleeve and bearing; the water-cooling system which comprises automatic inlet valve and flow switch can flush and dissipate heat to the separation sleeve automatically when the pump is exhausted and can send out alarm signal; the liquid storage bearing box makes the bearing still rotating a certain time in the pump liquid after the pump exhausted, combining with the dry-resistant bearing; the manometric-indicating supervisory instrument is set in the separating sleeve looping to check the abrasion of bearing. Said invention can ensure the magnetic rotor not high degaussing when the pump is exhausted, and it also can judge whether the bearing can be used or not.
Description
1 technical field
The present invention relates to a kind of pump, particularly a kind of magnetic drive pump.
2 background techniquies
Magnetic drive pump drives the impeller rotation in the pump housing by the permanent magnetism power between the inside and outside magnet rotor of magnetic airproof driver; By being installed in the static separation sleeve between the inside and outside magnet rotor, guarantee that its pump medium does not have leakage.Pump rotor is made up of interior magnet rotor, pump rotating shaft and impeller etc., is supported by forward and backward radial bearing, and controls its axial displacement by axial force balance mechanism.
Magnetic drive pump is widely used in carrying inflammable and explosive medium and poisonous medium.But when pump depletion occurring, be easy to take place the high temperature demagnetization and the damage of bearings of magnet rotor.
The separation sleeve of magnetic drive pump generally needs to use the metal manufacturing, can produce a large amount of eddy current heat in the separation sleeve during pump work, needs cooling liquid it is taken away.Otherwise the temperature of separation sleeve will raise rapidly, cause the inside and outside magnet rotor of separation sleeve particularly in magnet rotor high temperature demagnetization and the unable pump that makes rotates.
The radial support bearing of pump rotor is generally sliding bearing.Usually bearing is worked in pump liquid well, and the life-span is the several years.But, if serve as the pump liquid of metalworking coolant the frictional heat that bearing produces not to be taken away, the pump liquid in the bearing also can gasify rapidly, and cause bearing to do running: gently then its operating life is shortened in the bearing rapid wearing greatly; The cracked immediately damage of heavy then bearing.
General magnetic drive pump all is to draw one high-pressure service pump liquid as cooling liquid from delivery side of pump, and flow through separation sleeve inwall and bearing are walked with this eddy current torrid zone with separation sleeve, and realizes the cooling of bearing and lubricated.When pump depletion occurring, because pump duty interrupts causing cooling liquid to interrupt, the dried operational damage of bearing and the high temperature demagnetization of magnet rotor often will appear inevitably.
Whether external solve the main method that magnetic drive pump finds time to damage and be: by measuring the parameters such as flow, pressure and motor power (output) of pump, differentiate pump and occurred finding time, if occurred finding time, the power supply that cuts off motor by automatical control system makes the pump stall immediately; Employing is not easily broken and anti-dried running bearing that rate of depreciation is lower under dried operating condition, cooperates to adopt to prevent the over worn bearing wear detection device of bearing.
Domestic solution is: constituent is set, continuously with the direct cool metal separation sleeve of cooling water outer wall; Adopt anti-dried running bearing.
3 summary of the invention
The objective of the invention is: adopt the new method of simple and feasible, solve magnetic drive pump and do the operational damage problem because of the magnet rotor high temperature demagnetization problem and the bearing of finding time to cause.
The technical solution adopted for the present invention to solve the technical problems is: magnetic drive pump adopts the pump housing, bearing housing, magnetic airproof driver, sequence motor linkage structure; Utilize pump liquid that the separation sleeve and the bearing of magnetic drive pump are cooled off and lubricate; Install on the pump that a cover is made up of automatic water inlet valve and water switch etc., give separation sleeve outer wall bath heat radiation automatically and send the constituent of warning sign can be at pump depletion the time, magnet rotor can the high temperature demagnetization also not inform that in time the fault of finding time has appearred in magnetic drive pump when guaranteeing pump depletion; The certain hour inner bearing still turns round in pump liquid after adopting the water storage type bearing housing to realize pump depletion, in conjunction with adopting anti-dried running bearing, makes bearing be difficult for finding time damaging; Isolating running-on setting pressure table indicating type bearing wear detection device, can the differentiation pump stands its rear bearing of finding time continue to use.
In the present invention, can adopt and draw the conventional heat dissipation technology that pump liquid cools off and lubricates separation sleeve and bearing from delivery side of pump or zone of high pressure; Also can adopt by pump liquid recycle stream in the auxiliary lobe wheel drive bearing case moving to separation sleeve and bearing cool off, heat dissipation technology again circulates in the pump medium by pump liquid in the water cooling heat exchanger cooling bearing case.
Automatic water inlet valve among the present invention mainly contains two kinds of liquid current control inlet valve and hydraulic control inlet valves.In liquid current control inlet valve, an assembly that moves about that is placed in the pump medium cooling liquid indusion tube is arranged, other has a valve rod assembly that is installed in the outer indusion tube prolongation of the pump liquid pipe.During the pump proper functioning,, pump liquid in the indusion tube transferred to the end thrust of the assembly that moves about to the valve rod that promotes inlet valve moves, the water passage hole that stops up inlet valve to valve head makes it be in the pressure of closed condition by the magnetic repulsion between the same polarity magnetic pole.Behind the pump depletion, pump medium cooling liquid cutout, the thrust of valve head is disappeared, valve head moves to inlet valve in the other direction under the effect of spring force water passage hole is opened and is discharged water.
In the hydraulic control inlet valve, be provided with its inner pressure chamber that communicates with pump discharge.During the pump proper functioning, make the chamber wall generation deformation of pressure chamber by delivery side of pump pressure, the valve head that directly promotes on the valve rod assembly moves the water passage hole that stops up inlet valve; After its outlet pressure of pump depletion occurring and descending, same valve head is opened inlet valve under the effect of spring force and is discharged water.According to the difference of the character of pump medium, temperature, pressure, the structure of hydraulic control inlet valve, selection can be varied.
Among the present invention, to the requirement of water storage type bearing housing be: can store more pump liquid in the bearing housing; Pump liquid during pump depletion in the bearing housing is difficult for running off; Pump liquid during pump priming in the impeller cavity can enter in the bearing housing.Its solution is: adopt big volume bearing housing; Eliminate the quiet leakage on the bearing housing, it can auto-closing be the structure of mechanical seal when the pump depletion that two surface of contact of the preceding thrust bearing on the bearing housing liquid outlet channel are designed to, and at the bearing housing impeller end one-way exhaust valve that the one pump liquid steam that produces in the bearing housing with pump depletion the time only enters impeller cavity is installed by the position of horizontal top; Adopt the hollow pump rotating shaft, and when the impeller end of pump rotating shaft is installed a pump priming, can allow the pump liquid in the impeller cavity enter unidirectional feed liquor valve in the bearing housing through the hollow pump rotating shaft.
Two surface of contact of thrust bearing separately before when realizing the pump proper functioning, two surface of contact auto-closings are that the method for mechanical seal is: pump rotor employing impeller balance type automatic axial equilibrium of forces mechanism during pump depletion; Two surface of contact of preceding thrust bearing all are processed into the strict smooth flat vertical with the pump rotating shaft, comprise and adopt preceding thrust bearing with Elastic Contact face; The axial force of the suitable size that can not disappear during in additional one or several sensing motor direction on the pump rotor and at pump depletion.Additional axial force described herein, can be in the axial tension, pump of the internal magnet rotor of outer magnet rotor stationary permanent magnet (or ferromagnet) to pump liquid in the axial magnetic gravitation of permanent magnet on the pump rotor (or ferromagnet) or magnetic repulsion, the bearing housing to the end thrust of auxiliary impeller or the combination of these several axial forces.
Among the present invention, cause in the pump medium cooling liquid and have no progeny pump depletion occurring: have automatic water inlet valve in time to discharge water the eddy current torrid zone of separation sleeve is walked, the temperature that can guarantee separation sleeve can be not too high, magnet rotor can the high temperature demagnetization; There is the water storage type bearing housing to realize that its bearing still turns round in pump liquid, can guarantees that running can not take place to do the certain hour inner bearing behind the pump depletion; There is water switch electricity to connect the warning device signal that gives the alarm, can makes relevant personnel's blowdown pump fault of finding time of taking measures early, further reduce the possibility that bearing is done operational damage.
On the other hand, even there has not been pump liquid in the bearing housing, its anti-dried running bearing can be not cracked yet; Can differentiate its bearing and can continue to use by the bearing wear detection device in addition.
4 description of drawings
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the anti-magnetic drive pump embodiment's 1 that finds time of the present invention a structural drawing.
Fig. 2 is the structural drawing of liquid current control inlet valve among Fig. 1.
Fig. 3 is the anti-magnetic drive pump embodiment's 2 that finds time of the present invention a structural drawing.
Fig. 4 be with the corresponding plan view of Fig. 3 in the structural drawing of hydraulic control inlet valve.
Among the figure: 1, the pump housing, 2, impeller, 3, one-way exhaust valve, 4, liquid current control inlet valve, 5, cross water pipe, 6, connecting body, 7, interior magnet rotor, 8, separation sleeve, 9, outer magnet rotor, 10, motor reel, 11, water outlet, 12, back thrust button, 13, cross the water law orchid, 14, the probe mounting flange, 15, case lid, 16, probe, 17, rear bearing, 18, casing, 19, fore bearing, 20, flow-limiting plate, 21, preceding thrust button, 22, the pump rotating shaft, 23, unidirectional feed liquor valve, 24, indusion tube, 25, the assembly that moves about, 26, valve rod assembly, 27, spring (A), 28, valve rod base, 29, liquid inlet pipe, 30, the hydraulic control inlet valve, 31, grew water pipe, 32, the pumping hole side flange, 33, elastomer diaphragm, 34, the umbrella shape frame, 35, spring (B), 36, valve rod, 37, sealing gasket, 38, valve component, 39, bearing housing, 40, magnetic airproof driver, 41, motor, 42, impeller cavity, 43, baffle plate, 44, valve head, 45, water passage hole, 46, axial circumferential weld, 47, pressure chamber.
5 embodiments
5.1 embodiment 1
In embodiment shown in Figure 11, the pump housing 1, bearing housing 39, magnetic airproof driver 40, motor 41 are linked in sequence.When motor 41 rotations, the outer magnet rotor 9 on the motor reel 10 promptly drives the pump rotor rotation of being made up of interior magnet rotor 7, pump rotating shaft 22 and impeller 2 etc. synchronously by magnetic force and makes pump work.Between separation sleeve 8 and the probe mounting flange 14 is static seal, can guarantee that the pump medium does not have leakage.
Pump rotor is made radial support by fore bearing 19, rear bearing 17, carries out axial limiting by impeller balance type automatic axial equilibrium of forces mechanism and preceding thrust button 21, back thrust button 12.
Water storage type bearing housing 39 in the present embodiment is surrounded by casing 18, case lid 15 etc., and its volume is more much bigger with bearing housing than general magnetic drive pump.The one-way exhaust valve 3 that the pump liquid steam that produces in the bearing housing 39 can be entered impeller cavity 42 when pump depletion is equipped with in the position by horizontal top of impeller 2 ends on casing 18.In the hollow pump rotating shaft 22 of impeller 2 ingress, when being housed, pump priming can allow pump liquid in the impeller cavity 42 enter unidirectional feed liquor valve 23 in the bearing housing 39.Preceding thrust bearing on bearing housing 39 liquid outlet channels is made up of the front-end face of preceding thrust button 21 and fore bearing 19.
In the present embodiment, be equipped with by liquid current control inlet valve 4, cross water pipe 5, cross the constituent that water law orchid 13, connecting body 6, water outlet 11 and water switch (not drawing among Fig. 1) etc. are formed.The structure of liquid current control inlet valve 4 is seen Fig. 2: be made up of indusion tube 24, the assembly 25 that moves about, valve rod assembly 26, spring (A) 27, valve rod base 28 etc.; Valve rod in the valve rod assembly 26 can slide in valve rod base 28; On the abutting end of assembly 25 and valve rod assembly 26 that moves about, same polarity magnetic pole N (or same polarity magnetic pole S) is housed respectively face-to-face, and separates by the seal diaphragm on the indusion tube 24 between the two.
The liquid feeding end baffle plate 43 of assembly 25 of moving about constitutes the choked flow passage with indusion tube 24.During the pump proper functioning, pump liquid has certain end thrust to baffle plate 43.This thrust can be by the magnetic repulsion between the same polarity magnetic pole N (or S) on the assembly 25 that moves about, the valve rod assembly 26, transfer to promote valve rod assembly 26 move, to the pressure of the water passage hole 45 of valve head 44 plugging fluid current control inlet valves 4, make this valve be in closed condition.Pump liquid is flowed through behind the liquid current control inlet valve 4, and the inwall of the separation sleeve 8 of flowing through is again walked the eddy current torrid zone of separation sleeve 8, or the rear bearing 17 of flowing through again, fore bearing 19 cool off and lubricate it.At last, circumferential weld before cooling liquid is flowed through successively between two surface of contact of thrust bearing and the equalizing orifice on the impeller 2 enter the inlet of impeller 2.
When pump depletion occurring, pump medium cooling liquid is interrupted, and the thrust of the 43 pairs of valve heads 44 of baffle plate on the assembly 25 that moves about in the liquid current control inlet valve 4 disappears, and the water passage hole 45 of liquid current control inlet valve 4 is opened under the elastic force effect of spring (A) 27 automatically.Cooling water in the running water pipe, behind water switch (not drawing among the figure), along the path flows of the interior guiding gutter → water outlet 11 of the radially osculum → connecting body on the radially water inlet → separation sleeve 8 outer walls → outer magnet rotor 9 in water passage hole 45 → the mistakes water pipe 5 → mistake water law orchid 13 in the water inlet on the pump cover 15 → liquid current control inlet valve 46, the outer wall of separation sleeve 8 is carried out water-cooling.Meanwhile, the electricity of the water switch on the running water pipe is connected warning device and is made its signal that gives the alarm.
In the present embodiment: pump rotor adopts the impeller balance type automatic axial equilibrium of forces mechanism that is made up of impeller 2 and flow-limiting plate 20 etc.; The magnetic pole of outer magnet rotor 9 (representing with the two-wire hatching among the figure) is nearer from motor 41 than the magnetic pole (representing with the two-wire hatching among the figure) of interior magnet rotor 7, can produce the axial tension of sensing motor 41 directions of magnet rotor 7 in 9 pairs of the outer magnet rotors; The thrust surface of preceding thrust button 21 and the front-end face of fore bearing 19 are the smooth flat that did not have chute on it, and this two plane is all strict vertical with pump rotating shaft 22.
This composite structure, when the pump proper functioning, axial clearance about 0.4mm can guarantee to have an appointment between impeller 2 and the flow-limiting plate 20; Have an appointment between the front-end face of thrust button 21 and fore bearing 19 before can realizing axial clearance about 0.2mm.When pump depletion occurring, pump liquid disappears to the axial force of impeller 2 in the impeller cavity 42, pump rotor will be outside under the effect of the axial tension of magnet rotor 9 towards the direction motion of motor 41, contact formation mechanical seal with the front-end face of fore bearing 19 until the thrust surface of preceding thrust button 21.
In the present embodiment:, the pressure gauge indicating type bearing wear detection device of being made up of cylindrical grinding face and indicating pressure gage (not drawing among Fig. 1) etc. on probe 16, probe mounting flange 14, the back thrust button 12 is housed also 8 mouthfuls of separation sleeves.
5.2 embodiment 2
The structure of hydraulic control inlet valve 30 is seen Fig. 4, and it is made up of pumping hole side flange 32, pressure chamber 47, elastomer diaphragm 33, umbrella shape frame 34, spring (B) 35, valve rod 36, sealing gasket 37, valve component 38 etc.
During the pump proper functioning, delivery side of pump pressure outwards expands elastomer diaphragm 33, directly promotes valve rod 36 and moves in umbrella shape frame 34, and the sealing gasket 37 to valve head stops up the water passage hole on the valve component 38 45, makes hydraulic control inlet valve 30 be in closed condition.During pump depletion, the end thrust of delivery side of pump pressure and 33 pairs of valve rods 36 of elastomer diaphragm will descend significantly, and valve rod 36 moves under the elastic force effect of spring (B) 35 in the other direction, the water passage hole in the hydraulic control inlet valve 30 45 be opened discharge water.Current directly entered water pipe 5 after growing the water inlet on water pipe 31 and the pump cover 15, again by the path flows among the embodiment 1, the outer wall of separation sleeve 8 is carried out water-cooling.
Claims (8)
1, a kind of anti-magnetic drive pump of finding time, the pump housing, bearing housing, magnetic airproof driver, sequence motor connect, with pump liquid separation sleeve and bearing are cooled off and lubricate, it is characterized in that: be equipped with that a cover is made up of automatic water inlet valve and water switch etc., wash by water to dispel the heat when pump depletion, for automatically the separation sleeve outer wall and send the constituent of warning sign; The certain hour inner bearing still turns round in pump liquid after adopting the water storage type bearing housing to realize pump depletion, in conjunction with adopting anti-dried running bearing.
2, the anti-magnetic drive pump of finding time according to claim 1 is characterized in that: at the isolation running-on pressure gauge indicating type bearing wear detection device is housed.
3, the constituent of using in claim 1 or the 2 anti-magnetic drive pumps of finding time is characterized in that: the automatic water inlet valve that can open automatically when pump depletion to separation sleeve outer wall bath heat radiation is housed.
4, constituent according to claim 3 is characterized in that: the automatic water inlet valve that is adopted is a liquid current control inlet valve.
5, constituent according to claim 3 is characterized in that: the automatic water inlet valve that is adopted is the hydraulic control inlet valve.
6, the water storage type bearing housing that uses in claim 1 or the 2 anti-magnetic drive pumps of finding time, it is characterized in that: the bearing housing volume is big; Two surface of contact of the preceding thrust bearing on the bearing housing liquid outlet channel can auto-closing be mechanical seal when pump depletion; By the position of horizontal top, the one-way exhaust valve that the pump liquid steam that produces in the bearing housing can be with pump depletion the time enters impeller cavity is housed at the bearing housing impeller end; Adopt the hollow pump rotating shaft, and when the impeller end of pump rotating shaft is equipped with pump priming, can allow pump liquid in the impeller cavity enter unidirectional feed liquor valve in the bearing housing.
7, water storage type bearing housing according to claim 6, it is characterized in that: by two surface of contact with preceding thrust bearing all be processed into the smooth flat vertical with the pump rotating shaft and adopt Elastic Contact face, pump rotor adopt impeller balance type automatic axial equilibrium of forces mechanism, on pump rotor the additional axial force of pointing to the suitable size of motor direction, when realizing pump depletion before two surface of contact auto-closings of thrust bearing be mechanical seal.
8, water storage type bearing housing according to claim 7 is characterized in that: be attached to axial force on the pump rotor and be stationary permanent magnet (or ferromagnet) in the axial tension of the internal magnet rotor of outer magnet rotor or the pump to pump liquid in the axial magnetic active force of permanent magnet on the pump rotor (or ferromagnet) or the bearing housing to the end thrust of auxiliary impeller or the combination of these several axial forces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044377 CN1704611A (en) | 2004-05-30 | 2004-05-30 | Anti-pumping off magnetic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044377 CN1704611A (en) | 2004-05-30 | 2004-05-30 | Anti-pumping off magnetic pump |
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| Publication Number | Publication Date |
|---|---|
| CN1704611A true CN1704611A (en) | 2005-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410044377 Pending CN1704611A (en) | 2004-05-30 | 2004-05-30 | Anti-pumping off magnetic pump |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291627A (en) * | 2012-02-29 | 2013-09-11 | 黄佳华 | Magnetic pump capable of performing dry running and conveying impurities |
| CN105065335A (en) * | 2015-08-13 | 2015-11-18 | 湖南耐普泵业股份有限公司 | Cooling structure of high-temperature magnetic pump and magnetic pump with cooling structure |
| CN108518347A (en) * | 2018-06-11 | 2018-09-11 | 杭州大路实业有限公司 | A kind of integral shaft synchronizes canned motor pump to suspension permanent magnet |
| CN117489603A (en) * | 2023-12-29 | 2024-02-02 | 江苏双恒泵阀制造有限公司 | Wear-resistant magnetic pump |
-
2004
- 2004-05-30 CN CN 200410044377 patent/CN1704611A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291627A (en) * | 2012-02-29 | 2013-09-11 | 黄佳华 | Magnetic pump capable of performing dry running and conveying impurities |
| CN103291627B (en) * | 2012-02-29 | 2016-01-27 | 黄佳华 | A kind of dry running impurity magnetic drive pump |
| CN105065335A (en) * | 2015-08-13 | 2015-11-18 | 湖南耐普泵业股份有限公司 | Cooling structure of high-temperature magnetic pump and magnetic pump with cooling structure |
| CN108518347A (en) * | 2018-06-11 | 2018-09-11 | 杭州大路实业有限公司 | A kind of integral shaft synchronizes canned motor pump to suspension permanent magnet |
| CN108518347B (en) * | 2018-06-11 | 2024-03-15 | 杭州大路实业有限公司 | Integrated axial suspension permanent magnet synchronous shielding pump |
| CN117489603A (en) * | 2023-12-29 | 2024-02-02 | 江苏双恒泵阀制造有限公司 | Wear-resistant magnetic pump |
| CN117489603B (en) * | 2023-12-29 | 2024-03-26 | 江苏双恒泵阀制造有限公司 | Wear-resistant magnetic pump |
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