CN2793384Y - Centrifugal electric pump - Google Patents
Centrifugal electric pump Download PDFInfo
- Publication number
- CN2793384Y CN2793384Y CN 200420009047 CN200420009047U CN2793384Y CN 2793384 Y CN2793384 Y CN 2793384Y CN 200420009047 CN200420009047 CN 200420009047 CN 200420009047 U CN200420009047 U CN 200420009047U CN 2793384 Y CN2793384 Y CN 2793384Y
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- CN
- China
- Prior art keywords
- magnetic suspension
- suspension bearing
- permanent magnet
- pump
- stator
- 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
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Abstract
The utility model relates to a centrifugal electric pump, particularly to an air-proof electric pump without mechanical axle connection. The utility model comprises a pump body [3], a pump impeller [4], a flat permanent magnet motor and a magnetically suspended bearing, wherein the magnetically suspended bearing is arranged in a hollow axle bore of the flat permanent magnet motor, the pump impeller [4], a rotor [5] of the permanent magnet motor and a mover of the magnetically suspended bearing are coaxially assembled into a whole, and a stator [10] of the permanent magnet motor and the stator of the magnetically suspended bearing are coaxial and are combined with a base [1] into a whole. An exocyclic magnetic passage is formed between a rotor of the permanent magnet motor and a stator iron core. The coaxially and magnetically suspended bearing forms an endocyclic magnetic passage. The endocyclic magnetic passage and the exocyclic magnetic passage together limit to the pump impeller to move along the direction which is perpendicular to a rotary axial plane. The rotary part and the stationary part of the pump are completely isolated without dynamic sealing components, and the utility model solves the problem of easy producing leakage to pollute environment because of the dynamic sealing. Simultaneously, when the pump works, the utility model is quieter without abrasion and eliminates the vibration and noise of the mechanical driving. The volume of the pump is obviously reduced, and the weight is relieved because a driving axle and an axle coupling are cancelled.
Description
Technical field
The utility model relates to a kind of centrifugal electric pump, does not particularly have the sealing electric pump that mechanical axis connects.
Background technique
Existing common electric pump is by motor, water pump, and parts such as coupling constitute, wherein motor shaft by coupling the impeller shaft of transmission of movement feed water pump.All there is following shortcoming in common like this electric pump product:
1. because the existence of motor shaft and impeller shaft causes the electric pump volume to increase, raw material expend many;
2. impeller shaft need stretch out the airtight pump housing and moves outward, has the motive sealing that is easy to generate leakage, causes environmental pollution, and simultaneously, Sealing is easy to wear, and maintenance workload is big;
3. have Concentricity tolerance between motor shaft and the impeller shaft, vibration noise is big;
4. can produce corresponding vibration and noise when conventional mechanical bearings turns round.
The disc type sealing electric pump that Chinese patent " 97250027.8 " proposes, though cancelled motor shaft and coupling, utilize the electromagnetism transmission between disc type electric machine stator and rotor to replace traditional motor shaft drive-type mechanical transmission, overcome noise and leakage problem that shaft drive produces.But still there is a following shortcoming:
1. still there is bearing, can produces corresponding noise;
2. impeller rotates on stationary axle, and this axle is fixed on the pump housing, and the vibration meeting during the impeller operation is passed to air and ground by stationary axle, the pump housing.
The model utility content
The purpose of this utility model be at above-mentioned conventional pump and disc type sealing electric pump in the deficiency that exists aspect the noise control, provide a kind of no coupling transmission, the running of impeller incorporeity axle, the centrifugal electric pump of magnetic suspension of no conventional mechanical bearings support.It has does not have machinery wearing and tearing, little, the leak free characteristics of volume, as far as possible noise is reduced to minimumly, can satisfy the very extraordinary demand of the centrifugal electric pump of calm type.
The utility model adopts following technological scheme:
The utility model comprises the pump housing, pump impeller, flat magneto, magnetic suspension bearing, sealed end lid and bottom seat.Wherein, pump impeller, permanent magnet machine rotor, magnetic suspension bearing mover are arranged in the cavity that the pump housing and airtight end cap surround, and the three is fixedly connected to be integral, and realizes associated movement.
Permanent magnet motor stator, magnetic suspension bearing stator arrangement and separate with the pump housing is airtight in the cavity that base and airtight end cap surround.Between the permanent magnet machine rotor in the permanent magnet motor stator and the pump housing, and contact without any mechanicalness between magnetic suspension bearing stator and magnetic suspension bearing rotor, but pass through interaction between the magnetic field, the transmission of realization non-contact type power.Thereby the utility model rotating part and stationary part are isolated fully, need not the motive sealing parts.So just fundamentally solved pump owing to motive sealing is easy to generate leakage, problem of environment pollution caused.
Owing to the transmission of electromagnetic force non-contact type, cancelled traditional axle drive-type mechanical transmission between permanent magnet motor stator and the rotor, made this centrifugal electric pump eliminate original mechanically operated noise and vibration; Simultaneously, owing to cancelled transmission shaft and coupling, the volume of pump obviously reduces, weight saving.
Pump impeller moves under the effect of magnetic suspension bearing, owing to cancelled the required permanent entity rotating shaft of impeller rotation, and rolls accordingly or sliding bearing, just makes the utility model quiet more and not wearing and tearing in operation process.
Description of drawings
Fig. 1 is the utility model embodiment structural representation.Among the figure: 1 base, 2 airtight end caps, 3 pump housings, 4 pump impeller, 5 permanent magnet machine rotors, 6 internal magnetic rings, 8 outer magnetic rings, 7 upper yokes, 9 lower yokes, 10 permanent magnet motor stators, 11 outer iron cores, 12 inner iron cores, 13 iron yokes, 14 coils.
Fig. 2 is an A-A cross-sectional view among Fig. 1.
Fig. 3 is a magnetic suspension bearing stator structure schematic representation.
Fig. 4 is a main flux pathway figure in the magnetic suspension bearing.
Fig. 5 is magnetic suspension bearing control wiring figure.Among the figure: 15 amplifiers, 16 comparators, 17 latch, 18 are inhaled and are scolded driver, 19 bearing coils.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and the concrete mode that is fit to:
As shown in Figure 1, 2, the utility model electric pump is a vertical pump, from top suction fluid, discharges fluid from the side.
Pump divides two chambers up and down, and upper chamber is surrounded by the pump housing 3 and airtight end cap 2, and pump impeller 4 wherein is installed, permanent magnet machine rotor 5 and magnetic suspension bearing mover.The magnetic suspension bearing mover is made of internal magnetic ring 6, outer magnetic ring 8, upper yoke 7 and lower yoke 9.Wherein, upper yoke 7 and lower yoke 9 are ring.Upper yoke 7 is fixed on the bottom surface of pump impeller 4, and coaxial with it.It is fixedly connected and coaxial mutually with outer magnetic ring 8, four to be furnished with internal magnetic ring 6 between upper yoke 7 lower end surfaces and lower yoke 9 upper-end surfaces.Permanent magnet machine rotor 5 all is arranged on the bottom surface of disc pump impeller 4 with the magnetic suspension bearing mover, permanent magnet machine rotor 5 is arranged on the outer ring of disc pump impeller 4 bottom surfaces, the magnetic suspension bearing mover is arranged on the inner ring of disc pump impeller 4 bottom surfaces, and three's coaxial combination is an one; The lower chambers of pump is surrounded by airtight end cap 2 and cup dolly 1, and permanent magnet motor stator 10 wherein is installed, the magnetic suspension bearing stator.The magnetic suspension bearing stator is made of outer unshakable in one's determination 11, inner iron core 12, iron yoke 13 and coil 14.Wherein, coil 14 is wrapped on outer unshakable in one's determination 11, and outer unshakable in one's determination 11 and inner iron core 12 be arranged in iron yoke 13 above, and fixedly connected.Permanent magnet motor stator 10 and magnetic suspension bearing stator all be arranged on cup dolly 1 above, permanent magnet motor stator 10 is arranged on the outer ring above the cup dolly 1, and is relative with permanent magnet machine rotor 5 above the end cap across airtight end cap 2 above it; The magnetic suspension bearing stator is arranged on the inner ring of cup dolly, and is relative with the magnetic suspension bearing mover of end cap top across airtight end cap 2 above it.Both are coaxial and be combined as a whole with base 1; Upper chamber and lower chambers spigot shaft coaxle, two chambers are not communicated with up and down; Permanent magnet machine rotor 5 constitutes flat magneto with permanent magnet motor stator 10; And magnetic suspension bearing mover and magnetic suspension bearing stator constitute magnetic suspension bearing; This magnetic suspension bearing is arranged on the position of the central hollow axis hole of this flat magneto.
The utility model is by the rotation of the electromagnetic force driven pump impeller between permanent magnet motor stator and rotor, and the electromagnetic force between magnetic suspension bearing mover and the stator is suspended in the upper chamber that is surrounded by the pump housing 3 and airtight end cap 2 pump impeller, realizes not having the wearing and tearing operation.
Introduce the magnetic suspension bearing working principle below in conjunction with Fig. 3,4,5:
Figure 3 shows that the stator structure of magnetic suspension bearing, it is made up of four unit.Each unit comprises the iron yoke 13 of the outer iron core 11 of stator, inner iron core 12, coil 14 and four units shareds, H among the figure
A, H
B, H
C, H
DBe respectively the affiliated Hall sensor in four unit.
Six-freedom degree is as shown in Figure 2 arranged between magnetic suspension bearing stator and mover, be respectively moving and three axial rotations of X, Y, three directions of Z.Wherein have only the rotation around the Z axle to need, other five degrees of freedom should be restricted.
Pump is when running well, and the main flux between magnetic suspension bearing mover and stator as shown in Figure 4.Constitute the outer shroud flux path between flat permanent magnet machine rotor and stator core, ring flux path in coaxial magnetic suspension bearing constitutes; The inner and outer rings flux path retrains pump impeller moving along the vertical rotating shaft plane jointly.
Because bearing stator inner iron core 12, outer unshakable in one's determination 11 magnetic that produced are opposite with the magnetic of permanent-magnetic clamp 6,8 inside and outside the bearing mover respectively, make the magnetic suspension bearing mover be subjected to the effect of repulsion and float.The size that stator coil produces repulsion is being controlled mover along the moving of Z axle, and promptly axial mobile of Z has been subjected to the influence of stator repulsion that four coils produce and has been subjected to control.
When the bearing mover has mobile (being moving of XY plane) of X, Y direction, because this makes bearing stator iron core 11,12, the magnetic resistance that bearing stator iron yoke 13 and bearing mover lower yoke 9 are formed in the magnetic loop increases, and makes that the magnetic force between bearing stator and mover lower yoke has the trend that makes its maintenance origin-location; Simultaneously, the permanent magnet machine rotor 5 of design has identical radial dimension with permanent magnet motor stator 10, moving of X, Y direction can make that equally the magnetic resistance in the magnetic loop increases between permanent magnet machine rotor and stator, and the electromagnetic force between permanent magnet machine rotor and stator can stop the skew of its relative position.Like this, just controlled bearing mover moving in X, Y direction.
When the bearing mover produced the rotation of X, Y direction, the position between four unit of bearing mover and stator changed, and the distance that has increases, and the distance that has diminishes.At this moment, the Magnetic flux density of Hall sensor position changes.Reduce to change because Magnetic flux density forms dullness with distance increase between bearing mover and stator, so the output signal of Hall sensor can be used as feedback control signal.As shown in Figure 5, the analog output signal of Hall sensor after amplifying through differentiating amplifier 15 with reference voltage V
Reference(5V) in comparator 16, compare, obtain feedback signal S
A, S
B, S
C, S
DThese four feedback signals can be used as the attitude signal of mover.
For example, as the close Hall sensor H of mover
AWhen surpassing certain limit, S
ABecome " 0 "; On the contrary, depart from Hall sensor H when mover
AWhen surpassing certain limit, S
ABecome " 1 ".Because bearing stator unit A is between Hall sensor A, B, therefore, the size of electric current is by signal S in the unit A coil 19
A, S
BControl.Work as S
A, S
BWhen all being " 1 ", show that the distance of magnetic suspension bearing mover and unit A increases, surpassed predetermined limit, so, to inhale and scold driver 18 to make that electric current diminishes in the unit A coil 19, repulsion reduces, even oppositely, forms suction.The magnetic suspension bearing mover will be to the azimuth rotation of unit A like this; Work as S
A, S
BWhen all being " 0 ", show that the distance of magnetic suspension bearing mover and unit A reduces, surpassed predetermined limit, so electrorheological is big in the unit A coil 19, repulsion increases.The magnetic suspension bearing mover will be to the azimuth rotation that departs from unit A; Work as S
A, S
BWhen signal was inequality, electric current was constant in the unit A coil 19, and the magnetic suspension bearing mover keeps original attitude.The magnetic suspension bearing mover just is restricted in the rotation of X, Y direction like this.
Remain on central position stable operation when in addition, the shape that impeller outer edge is designed to tapering also helps its rotation.
The utility model is pump and magneto and a kind of electric pump of magnetic suspension bearing design all-in-one-piece.Be applicable to fields such as various conveying liquid, gas, stream-liquid two-phase flow, especially to the quiet residential houses that has higher requirements, fields such as heating, military affairs have more using value.
Claims (6)
1, a kind of centrifugal electric pump comprises the pump housing [3], pump impeller [4], flat magneto and bearing, it is characterized in that its bearing is a magnetic suspension bearing, and magnetic suspension bearing is arranged on the hollow axis hole of flat magneto; Pump impeller [4] and permanent magnet machine rotor [5], magnetic suspension bearing mover three coaxial combination are one, and permanent magnet motor stator [10] is coaxial and be combined as a whole with base [1] with the magnetic suspension bearing stator.
2, centrifugal electric pump according to claim 1 is characterized in that magnetic suspension bearing is made of magnetic suspension bearing mover and magnetic suspension bearing stator; The magnetic suspension bearing mover is made of internal magnetic ring [6], outer magnetic ring [8], upper yoke [7] and lower yoke [9]; Upper yoke [7] and lower yoke [9] are ring; Upper yoke [7] is fixed on the bottom surface of pump impeller [4], and coaxial with it; Be furnished with internal magnetic ring [6] and outer magnetic ring [8] between upper yoke [7] lower end surface and lower yoke [9] upper-end surface, four is fixedly connected and coaxial mutually; The magnetic suspension bearing stator is made of outer iron core [11], inner iron core [12], iron yoke [13] and coil [14], and coil [14] is wrapped on outer [11] unshakable in one's determination, and outer [11] unshakable in one's determination and inner iron core [12] be arranged in iron yoke [13] above, and fixedly connected.
3, centrifugal electric pump according to claim 1 and 2, it is characterized in that permanent magnet machine rotor [5] and magnetic suspension bearing mover all are arranged on the bottom surface of disc pump impeller [4], permanent magnet machine rotor [5] is arranged on the outer ring of disc pump impeller 4 bottom surfaces, the magnetic suspension bearing mover is arranged on the inner ring of disc pump impeller 4 bottom surfaces, and three's coaxial combination is an one; The lower chambers of pump is surrounded by airtight end cap [2] and cup dolly [1], and permanent magnet motor stator [10] and magnetic suspension bearing stator wherein are installed; Permanent magnet motor stator [10] and magnetic suspension bearing stator all be arranged on cup dolly [1] above, permanent magnet motor stator [10] is arranged on the outer ring above the cup dolly [1], and is relative with permanent magnet machine rotor [5] above the end cap across airtight end cap [2] above it; The magnetic suspension bearing stator is arranged on the inner ring of cup dolly [1], and the magnetic suspension bearing mover across airtight end cap [2] and end cap top above it is relative, and both are coaxial and be combined as a whole with cup dolly [1]; Upper chamber and lower chambers spigot shaft coaxle, two chambers are not communicated with up and down.
4, centrifugal electric pump according to claim 1 is characterized in that constituting the outer shroud flux path between flat permanent magnet machine rotor and stator core, ring flux path in coaxial magnetic suspension bearing constitutes; The inner and outer rings flux path retrains pump impeller moving along the vertical rotating shaft plane jointly.
5, centrifugal electric pump according to claim 1 is characterized in that its rotating part and stationary part isolate fully, does not have the motive sealing parts.
6, centrifugal electric pump according to claim 1 is characterized in that it is a vertical pump, from top suction fluid, discharges fluid from the side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009047 CN2793384Y (en) | 2004-05-24 | 2004-05-24 | Centrifugal electric pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009047 CN2793384Y (en) | 2004-05-24 | 2004-05-24 | Centrifugal electric pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2793384Y true CN2793384Y (en) | 2006-07-05 |
Family
ID=36820529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420009047 Expired - Fee Related CN2793384Y (en) | 2004-05-24 | 2004-05-24 | Centrifugal electric pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2793384Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667019A (en) * | 2010-04-22 | 2012-09-12 | 维家有限及两合公司 | Drain having an integrated pump comprising a hydraulic drive |
| CN114922825A (en) * | 2022-06-15 | 2022-08-19 | 杭州大路实业有限公司 | Centrifugal pump structure driven by disc type motor |
-
2004
- 2004-05-24 CN CN 200420009047 patent/CN2793384Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102667019A (en) * | 2010-04-22 | 2012-09-12 | 维家有限及两合公司 | Drain having an integrated pump comprising a hydraulic drive |
| US9187888B2 (en) | 2010-04-22 | 2015-11-17 | Viega Gmbh & Co. Kg | Drain, in particular shower drain |
| CN114922825A (en) * | 2022-06-15 | 2022-08-19 | 杭州大路实业有限公司 | Centrifugal pump structure driven by disc type motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |