CN103161735B - Wet rotor pump with pre-chamber - Google Patents

Abstract

The invention relates to a wet rotor pump, which comprises a stator and rotors separated by a sealed pipe. The rotor comprises a rotor shaft and a rotor combination, wherein the rotor is supported in a rotor chamber formed by the sealed pipe and is rotatable. Wherein, an impeller is arranged on an axial end of the rotor shaft for promoting liquid flow, and the impeller is arranged in a pump chamber. The sealed pipe includes a radially outwardly extending flange at an impeller side end. A bearing support with a bearing for bearing the rotor shaft is arranged between the sealed pipe and the rotor shaft. The bearing support is supported by the sealed pipe. A pre-chamber lies between the impeller and the flange, and is limited by a dimensionally-stable separator in a direction facing to the impeller, wherein the pre-chamber is communicated to the rotor chamber by channels.

Description

Wet impeller pump with front chamber

Technical field

The present invention relates to a kind of wet impeller pump, the wet impeller pump is with a stator and one by turning that seal pipe separates Son.The wet impeller pump includes an armature spindle and a rotor combination, and rotor is supported in the rotor formed by seal pipe It is in room and rotatable.Wherein, in an axial end portion with an impeller for promoting liquid to flow, this impeller sets armature spindle Put in pump chamber room, seal pipe has a flange for extending generally radially out in impeller end, in seal pipe and armature spindle Between be provided with a bearing block with bearing, for support of rotor shaft, this bearing block is support by seal pipe.

Background technology

In the wet impeller pump of here, rotor rotates in liquid, in general, this liquid equivalent to by conveyance fluid, a side Face is consequently formed the liquid of rotor chamber and by conveyance fluid while produce heat exchange, to reach the effect of cooling rotor.It is another Fluid lubricated bearing in aspect rotor chamber, forms sliding bearing.In general, water is conveyed and made in rotor chamber With.

For seriously by the liquid of particle contamination, such as：Magnetic iron particle, magnetic is got rusty granule, lubricant material, addition Agent material, these granules are stopped in rotor chamber, and can cause abrasion even obstruction rotor and bearing.For this reason that, turn Seed cell can separate with pump chambers substantially, and can with separated by conveyance fluid.This will cause rotor space and pump chamber not to have liquid to hand over Change, the low cooling of rotor chamber then occur.So, there is a liquid circulation for passing through rotor chamber to be favourable.

In general, rotor chamber be wet impeller pump it is most hot where because the waste heat major part produced in stator passes through Seal pipe passes to rotor chamber.If adopting plastic components in rotor chamber, such as bearing and bearing made of plastic is shielded, that The heat produced in electromotor is due to the insulating properties of plastics, it is impossible to fully pass the liquid flowed in pump case.It is false As rotor chamber fills conventional use water, then spend at 60 DEG C more than temperature and have more lime precipitations.Lime precipitation many or It is less to be determined according to hardness of water.For this reason, fluid exchange a small amount of between rotor chamber and fluid is kept as far as possible, It is to be worth pursuing.

The content of the invention

Therefore the task of the present invention is to provide a kind of wet impeller pump, and on the one hand this wet impeller pump is reducing to greatest extent fluid While exchange, can provide and effectively radiate enough, the heat in rotor chamber is sufficiently effective delivered in fluid, the opposing party Face avoids the precipitation of solid particle and the risk of lime precipitation, or this risk is reduced to into most lowest limit degree.

Described task, is addressed by wet impeller pump by feature of the present invention on this, is described in detail as follows.

Wet impeller pump, with a stator and a rotor separated by seal pipe and the stator, the wet impeller pump includes One armature spindle and a rotor combination, rotor is supported in the rotor chamber formed by seal pipe, and rotatable, its In, in an axial end portion with an impeller for promoting liquid to flow, this impeller is arranged in pump chamber room armature spindle, seal pipe There is a flange for extending generally radially out in impeller side end, one is provided between seal pipe and armature spindle and is carried The bearing block of bearing, for support of rotor shaft, this bearing block is support by seal pipe, it is characterised in that impeller and flange it Between have a front chamber, this front chamber towards impeller direction is limited by a slider, and is being convex towards stator direction What edge was limited, wherein, front chamber is connected with rotor chamber by passage.

Of the present invention is a kind of wet impeller pump, and the wet impeller pump is separated with a stator and one by seal pipe Rotor, the rotor includes an armature spindle and a rotor combination, and rotor is supported on the rotor chamber formed by seal pipe In, and it is rotatable.Wherein, in an axial end portion with an impeller for promoting liquid to flow, this impeller is arranged armature spindle In pump chamber room, seal pipe has a flange for extending generally radially out in impeller side end, in seal pipe and armature spindle Between be provided with a bearing block with bearing, for support of rotor shaft, this bearing block is support by seal pipe, in impeller There is a front chamber between flange, this front chamber is being limited towards impeller direction by slider, towards stator direction court Limited by flange, wherein, front chamber is communicatively linked together with rotor chamber by passage.

The core idea of the present invention is that a relatively large front chamber is provided between rotor chamber and pump chambers, that is, Say, after impeller and flange between so that the strong turbulence of pump chambers can not enter front chamber.For pump chambers, front chamber In liquid flowing it is rather tranquil to a great extent.This is reached by slider.

Slider front chamber and pump chambers from spatially separating, so as to rotor chamber and the vortex caused due to impeller point From.The slider additionally provides relatively large surface area, can be used as a heat exchanger.Additionally, this front chamber/stilling chamber By bearing block and in bearing block, bearing separates with rotor chamber, wherein, between front chamber and rotor chamber, have enough by passage Fluid exchange occur, it can be ensured that necessary heat exchange.

Passage may be located in bearing block, and/or between bearing block and seal pipe, and/or in bearing and bearing block Between.By slider, its inwall is flooded by circulation of fluid, and heat is subsequently passed to the conveying liquid in pump chambers.Cause This slider is herein as heat exchanger.

Another advantage of front chamber is, the granule or issuable granule in rotor chamber, such as lime precipitation Or abrasion, pile up in front chamber.If pump is closed, granule falls in bottom, and is deposited in the bottom of front chamber, and they are just not Rotor chamber can be entered into or the bearing clearance of sliding bearing can not be entered, and can there be caused abrasion or damage.

Flange can be molded in seal pipe and form one, or sealing is inserted in seal pipe or inserted as single part Guan Li.

At least wet impeller pump in working order under, front chamber preferably towards pump chambers direction be close.Pump is in non-work Under making state, such case is not necessarily intended to be occurred.It means that wet impeller pump is in a non-operative state, that is, it is being not pressurized In the state of, front chamber is being to close or opening towards pump chambers direction.Can be explained behind embodiment. One of case described above, front chamber is all to close under pump work and off working state, wherein, in wet impeller pump Front chamber can by one tool shape stability, and including slider part constitute.This can prevent completely in fluid Grain penetrates into rotor chamber.

In an advantageous embodiment, slider can be a filter.Wet impeller pump in working order under, ante-chamber Room remains and separates with pump chambers, but liquid can flow through slider.By this way, front chamber and pump chambers can be produced Raw fluid exchange, so further improves radiating, while and can ensure that the bulky grain of fluid does not enter pump chambers.

Isolator itself can be as a filter, and/or containing one or more filters part.Along isolator Concentric circular, these parts can be symmetrical.Therefore, separator does not rely on specific installation site.Filter element is tried one's best Radially outer position is arranged on, can be reached in front chamber, and/or more preferable ventilation effect in rotor chamber.

Filter component can be made up of spongiform filtering bodies, netted tissue of metal or plastics, secondly mistake Filter can also be made, filter portion by opening on filter itself part equivalent to the little opening by filtration granular size Part is loaded in slider (solid), is fixed on slider (netted tissue), or composition (opens in inner slider Mouthful).If little opening is formed in slider, this slider inherently filter.These openings can be the side to bore a hole Formula branch is on slider surface all or in part.Or slider has network structure, that its own can be exactly a filtration Device.

Preferably, front chamber is being limited by a tubular row outer wall in a radially outer direction, and this outer wall is in an axle End connects together with flange, and supports slider in its another shaft end, or againsts slider, or closes with slider And.Slider such that it is able to outer wall formed one, outer wall is merged with slider in the other end, or slider be with outward The unrelated separate part of wall, slider is only only to lie on the outer wall or against outer wall.

Above-described two kinds of situations, slider is firm, that is to say, that dimensionally stable and not flexible.In addition, every There can also be certain elasticity and pliability in vitro.These features depend primarily on the thickness of used material and slider.

So slider can be made up of a kind of material, the existing certain shape stability of this material has pliability again. It means that slider can be under stress dynamic, it is particularly rotatable.One kind have certain thickness elastoplast or Foil especially properly makes slider.In the present embodiment, slider forms one or reclines on the outer wall with outer wall.

Or slider can be that shape is unstable completely, at least in the region of its radial outside, preferably every In vitro whole region.This slider in the following manner can be obtained, for example, with above-mentioned network structure or by a barrier film Formed.In this case, slider is equally that tool is resilient, but it must by extra support.Due to lacking shape Stability, slider can be fastened on another shaft end of outer wall, particularly there is clipped in by, so as to the end of this outer wall Portion supports slider.

In contrast, for a dimensionally stable, flexible slider, this slider leans against another shaft end of outer wall Portion, because dimensional stability is tight without being fixed or being propped up.Particularly pump in working order under, slider abuts in outer wall End lies in the end of outer wall, will be described later.

In order to obtain a front chamber for substantially closing off towards the direction of stator, outer wall can hermetically be attached to convex On edge.For example can seal directly or indirectly through being realized, sealing lip using a sealing lip, seal disc or sealing ring Disk or sealing ring are constituted on the outer wall and form one with outer wall, or are located between outer wall and flange as an individual components.

Preferably, front chamber towards rotor direction of principal axis is limited by an inner ring, and this inner ring is It is connected with bearing block, and supports slider or merge into a single whole with slider.Particularly inner ring, inner ring can be in one Individual axial end portion links together with bearing block, supports slider in another shaft end or merges into a single whole with slider.

Additionally, front chamber can be sealing towards the direction of armature spindle.This can be directly or indirectly through using one Individual sealing lip, seal disc or sealing ring and realize, it is preferred that come real by using a dynamic sealing or bearing ring seal It is existing.

Slider preferentially selects thermally-conductive materials, is particularly made of metal.Such as, division board can by sheet metal, Steel or pyrite are making.Can also be made with heat conductivity plastics.Efficient heat transfer is so ensured that, heat can be effectively The liquid being delivered to by slider in pump chambers.

It was noted earlier that slider at least partly has flexible barrier film to make for available one.This barrier film has the advantage that： It can bear pressure pulse, for example, the pressure pulse occurred when pump is opened and closed.Additionally, it can also be provided turning Pressure between seed cell and pump chambers is balanced.The barrier film can be made up of the plastic material of elasticity or metal, for example, steel diaphragm. Steel diaphragm has higher heat transfer coefficient than plastic film, therefore can reach more preferable heat-transfer effect.

Made with barrier film in the embodiment of slider, slider can be fixed on the inner side of inner ring, for example, it is pasted It is being welded on or by firm grip in the collar of inner ring.Barrier film can also be securely fixed on outer wall.

However, barrier film is if loosely lie in towards on the front of the outer wall shaft end of impeller, it is favourable.In order to increase Contact surface, outer wall can have a convex surface being directed radially inwardly toward, and barrier film can be allowed to overlie.Because the pressure of pump chambers is more than The pressure of rotor chamber, barrier film is crushed on the front of outer wall.So barrier film need not be by extra, omnibearing fixation.Barrier film quilt One or several positions of outer wall are fixed on, so that barrier film keeps its position, this has especially help for the installation of pump.Pump Under in working order, barrier film is impenetrable liquid, but non-hermetic front for being attached to outer wall.This can ensure that, when pump starts fortune OK, when rotor chamber is filled liquid, gas overflows from rotor chamber top.Additionally, pump is when out of service, the liquid in rotor chamber Overflow in the gap that can also pass through between barrier film and outer wall front.

Preferably, slider is near impeller, wherein, the distance between impeller and slider are selected, and should depend on impeller Diameter, particularly, this distance can be 0.015 times to 0.04 times of impeller diameter.Because there is the strong rapids in face after the impeller Stream, can cause hydraulic slip, promote have relatively small gap between impeller and slider so that turbulent flow is reduced, so as to improve Work efficiency.

The wet impeller pump of the present invention, bearing block can form one with seal pipe.Here, bearing block is excellent together with seal pipe Choosing selects made of plastic.Beyond above-mentioned feature, additionally or alternatively, bearing block and bearing integrator, and the axle for becoming Bearing component.In the case, bearing block assembly preferably selects made of plastic.

In addition to the above embodiments, additionally or alternatively, slider or at least inner ring can form one with bearing block. Additionally or alternatively, slider can form one with inner ring, particularly be made of plastics.This is suitable, when slider is The wall of dimensionally stable, such as in order to receive above-mentioned filter element.

Outside above-mentioned function, additionally or alternatively, seal pipe has a bottom at it back to the axial end portion of impeller, For closing rotor chamber, therefore seal pipe becomes a so-called sealing pan.

One of above-mentioned embodiment feature, additionally or alternatively, for the fixation of slider, outer wall is particularly by radially horizontal Bar links together with coaxial inner ring.If this slider is by made by barrier film, the especially unstable barrier film of shape, this is It is particularly advantageous.This barrier film can be lain on cross bar, particularly loose or be only fixed on other several positions, and is passed through Cross bar is supported.

According to another favourable aspect of the invention, except features described above, additionally or alternatively, wet impeller pump exists Under idle state, that is, in the state of being not pressurized, slider can it radially outward the subregion of Zhou Yuan with it is outer Form gap between wall, wet impeller pump in working order under, slider can be crushed on outer wall.If slider abuts in outer wall On, then front chamber can be closed.Such as wet impeller pump in a non-operative state, there is distance between slider and outer wall, then Outer wall has a gap with slider, so, can be overflowed from front chamber according to the position one side gas in gap, and/or Another aspect granule can be escaped from front chamber, additionally, liquid can enter front chamber during filling pump.

Wet impeller pump is under idle state, that is to say, that in the state of being not pressurized, it is preferred that slider is in its Jing There is gap between the subregion of periphery circle and outer wall, according to the installation site of pump, the subregion is located at below pump. The particles fall that pump rotates everywhere in a non-operative state, once in front chamber, and can be by slider and outer wall to bottom Between gap continue to drop to pump chambers, pump next time start when, granule is conveyed out therefrom.

In order to realize that granule falls into the inside of pump chambers room, the inner side of outer wall is at least dipping down towards the region in impeller direction Tiltedly.Then granule can fall into pump chambers along slope slide downward.

Above-described in order to realize, slider can be one flexible annular disk, especially useful steady by shape It is fixed, elastoplast or one it is thin, the sheet metal that can be moved is made.The plastics of sheet metal or dimensionally stable are with an elastic diaphragm Than, thiing have the advantage that, it with more shape stability and need not be fixed on outer wall in the case of thickness identical. Additionally, such slider can bear bigger power, and preferably the liquid in the heat transfer to pump chambers of front chamber In.Transverse bar between outer wall and inner ring can be omitted, so that the liquid of front chamber more preferably comes through slider for heat radiation energy.

Particularly advantageously, if wet impeller pump is under idle state, that is to say, that in the state of being not pressurized, isolation Body also has gap not only in its warp-wise periphery circular portion region between its warp-wise periphery circle Zone Full and outer wall, and Wet impeller pump in working order under, slider is forced on outer wall.Therefore, the granule of bottom and gas above can be from ante-chambers Room escapes, without depending on the slider installation direction relative to wet impeller pump installation site.

In addition to the features described above, additionally or alternatively, the inner side of outer wall can be at least in the bottom of front chamber to impeller Incline.This refers to that the inner side of outer wall expands between impeller and the rotary shaft of pump shaft in the distance towards impeller direction.This Also refer in front chamber bottom, relative to the installation site of wet impeller pump, gradient is downward, that is, along center of gravity power side To.Further improving in embodiment, above-described gradient can fully continue, so that front chamber is rotationally symmetrical 's.That is, front chamber towards the direction of pump chambers be open, or, inside outer wall is being round towards the direction of stator Taper.This this have the advantage that, in order to realize that granule in front chamber's bottom accumulation can be slided into forward in pump chambers, It is not dependent on the outer wall position relative to pump installation site.

In order to realize a kind of front chamber, outer wall that the radial direction of this front chamber is restricted and inside outer wall are towards impeller direction Incline, then can use with single wall and have the outer wall of constant thickness, it is being cone towards the direction of stator that outer wall is overall 's.This is that is, the outside of outer wall is being conical towards the direction of stator.Or outer wall can be triangle in axial cross section Shape, wherein, the thickness of outer wall less and less towards impeller side, while the internal diameter of front chamber becomes much larger.It is alternatively possible, outward Wall can be double-walled in each embodiment, wherein, the first wall of inner side can limit front chamber, and its shape has with above-mentioned Single wall and have constant thickness outer wall be consistent, however, second wall in outside is parallel into axle with armature spindle.First wall of inner side Forming acute angle towards the front of impeller and merging into a single whole with second wall in outside.

Except foregoing feature, additionally or alternatively, in order to improve heat transfer to the radiating effect of front chamber, every Can usually increase surface area with structural elements in vitro.These structural elements can be screw thread shape, ditch flute profile, brief summary particle shape , crimping shape, or groove type.

Preferably, these structural elements are located towards the slider reverse side of front chamber, if structural element is located in court To the slider front of front chamber, hydraulic slip can be caused.

Structural element can improve the absorption of heat in the reverse side of slider.In order to preferably effectively radiate, such as structural detail Be be molded in it is positive, then structural element towards the direction of impeller should not too towering-up, such hydraulic slip is not too large, structure Element can have various ways to mould, such as：Radial direction, secant shape, circular concentric, or it is spiral.

According to another kind of preferred expansion scheme of wet impeller pump of the invention, in addition to feature described above, add or replace Dai Di, bearing block has a wheel rim extended towards outer wall at it towards the shaft end of impeller, and this wheel rim is divided into one front chamber Individual cup and a rear chamber back to pump chambers towards pump chambers direction.This wheel rim can also can have as a dividing wall Pointedly guide the liquid flowing of front chamber.

Preferably, above-mentioned cup and rear chamber are at least through together with an open communication, so that liquid can be from One room spatial flow is to another room space.Wheel rim has an opening, and this opening is formed by the distance between wheel rim and outer wall.

At least one opening can be annular, that is to say, that wheel rim is having where certain distance eventually with inside outer wall On.Alternatively it is also possible to there is multiple openings.These multiple openings can also be in wheel rim or by between wheel rim and outer wall Distance and formed.

If multiple openings, together with wheel rim can be merged into outer wall, wherein, these openings are arranged on wheel rim wheel rim On.

Single opening or multiple openings in above-mentioned be located at radially outer position, so as to shove farthest pass through every In vitro.

Preferred expansion scheme one of in the embodiment above, front chamber, particularly its cup have a direction to turn The open space of sub- axle.In this open space, armature spindle can support another impeller, and this impeller can promote at least partly The liquid flowing in front chamber of radial direction.Another impeller can be a turbine or a disk, axle front With groove or screw thread, this is conveyed to promote liquid.Such as, groove or screw thread can be screw types.Impeller should be less, It is easy to produce minimum flow.So, impeller length in radial directions only need to 1/4 and 1/3 armature spindle radius it Between.

Preferably, armature spindle is a hollow axle with centre bore, be can flow through by center boreliquid, this hollow axle It is open in the shaft end of dorsad impeller, and is merged into rotor chamber therefrom.

Relative to the axial direction of armature spindle, armature spindle can have one or more transverse holes, by transverse holes, armature spindle In liquid can be flowed into front chamber.Above-described one or more transverse holes play the work of connection centre bore and front chamber With so as to realize liquid circulation.These transverse holes have promoted liquid flowing, so, above mentioned another impeller It is substantially unwanted.But, add or additionally using also possible.

If using a turbine as extra impeller, then its blade axially extends to drilling Before, when rotating so as to armature spindle, blade additionally accelerates liquid to flow.Simultaneously low pressure is produced in transverse holes, by this low pressure, Liquid in rotor chamber is inhaled in armature spindle.In addition, blade radially outward conveys the liquid in front chamber, wherein, liquid Body stream, and can be its heat transfer to division board through the reverse side of dividing wall.

Even if another impeller is not present, as in the temperature inclination and centrifugal force of horizontal bore region, therefore and produce The raw liquid circulation in rotor chamber and front chamber.

In outer region, liquid can be in axial direction from cup stream to rear chamber, and from there through bearing block and sealing Passage between pipe, and/or person enters rotor chamber by the passage between bearing block and bearing, liquid is added in rotor chamber Heat, and flow into armature spindle in rotor shaft end.Therefore an effective cooling system is maintained, by this cooling system, rotor The heat of room is effectively scattered on the slider between front chamber and pump chambers, and then, slider is heat transfer to pump In the liquid of chamber.

The other advantages and features of the present invention, will be described in further detail by following examples and accompanying drawing.

Description of the drawings

The partial view of the axial cross section of accompanying drawing 1, according to a kind of wet impeller pump of invention, with a big front chamber and shape The stable slider of shape

The partial view of the axial cross section of accompanying drawing 2, according to another kind of wet impeller pump of invention, with a big front chamber and And have flexible barrier film and made by slider

The longitudinal cross-sectional view of accompanying drawing 3, according to another kind of wet impeller pump of invention, with a front chamber for being separated and leaf The thermal cycle that piece drives

The zoomed-in view of the bearing block assembly of accompanying drawing 4 (with reference to the accompanying drawings 3)

Specific embodiment

Accompanying drawing 1 shows the axial cross section Local map of wet impeller pump 1 in this invention.This figure only show the hydraulic pressure of pump 1 Part and the transition region for being connected the motor of pump 1, this part is fully shown in Fig. 3.Pump 1 includes stator 3 and is sealed The separate rotor 5,6 of pipe 2, this rotor includes rotor 5 and rotor combination 6, and is supported in by the rotor chamber 4 of the shape of seal pipe 2 In, and it is rotatable, look at accompanying drawing 3.Rotor combination 6 includes permanent magnet, and permanent magnet is not by the further display in figure 's.

Armature spindle 5 is projected in a pump chambers 15 in an axial end portion, and in that one impeller 7 of support, to promote Liquid flows.Seal pipe 2 has a big supreme flange 8 for extending radially outwardly in the end on its impeller one side.Flange 8 with There is a bearing block 9 with sliding bearing 10 between armature spindle 5, be for supporting armature spindle 5.Sliding bearing 10 is securely In bearing block 9.Bearing block 9 is again fixedly mounted in seal pipe 2.There is one to be used between impeller 7 and flange 8 The annular front chamber 11 of stable liquid flowing.This front chamber 11 is being limited towards the direction of impeller 7 by slider 12, slider 12 It is dimensionally stable in this embodiment.Towards the direction of stator 3, front chamber 11 is limited by flange 8.Front chamber 11 with Connection between rotor chamber 4 is only by positioned at the outer tunnel 14 between bearing block 9 and seal pipe 2 and positioned in sliding bearing 10 With the internal channel 13 of bearing block 9.

There is a part 30a towards the side of the bearing block 9 of pump chambers 15, in order to be able to insert dynamic sealing 30, dynamic is close Envelope 30 is to seal the armature spindle 5 of rotation.Can be using labyrinth or gap as a dynamic sealing 30 Sealing member is keeping little media flow.Additionally, having a part 35 towards the side of the bearing block 9 of pump chambers 15, with one The form of individual cannelure, slider 12 is inserted in this cannelure.So as to be formed in the contact area of slider and bearing block 9 The sealing surface of one circle.

Slider 12 is to use a kind of dimensionally stable, made by the material with high heat transfer coefficient, such as, is by having The plastics or metal of thermal contact are made, and it separates front chamber 11 with pump chambers 15.Slider 12 has porous disc Shape.Due to the rotation of the armature spindle 5 in running, the liquid in rotor chamber 4 is also brought into rotary motion.Heat from Stator 3 is transferred to rotor chamber 4 by seal pipe 2, and by the liquid absorption in rotor chamber 4.Liquid by internal channel 13 with it is outer Passage 14 reaches front chamber 11.Slider 12 plays a part of heat exchanger plate, transfers heat to the conveying in pump chambers 15 Liquid stream.

In the example depicted in fig. 1, front chamber 11 mainly closes, no matter in the working condition of wet impeller pump 1, also It is in off-mode.Front chamber 11 is limited in radially outward direction by a tubular outer wall 16.

This outer wall 16 is parallel to the axial direction of armature spindle 5, and hermetically abuts on flange 8 in an axial end portion.This is convex Edge 8 has an annular projection 28 extended towards pump chambers 15, and outer wall 16 is abutted on its inner side.Have in this device region One projection 29, extends and hermetically press against the inner side of projection 28 along the circumference of outer wall 16.In its another axial end portion from outer Wall 16 is transitioned into slider 12, and this illustrates that they form as one.The axial length of outer wall is isolated no better than porous disc profile Body 12 radial direction width, it can be said that being the presence of a big front chamber 11.

Additionally, front chamber 11 is also to be sealed towards the direction of armature spindle 5.It is so to produce in the example shown in accompanying drawing 1 Raw, front chamber 11 is being limited towards the direction of armature spindle 5 by an inner ring 17, and inner ring 17 is abutted on bearing block 9, particularly In lying in annular element 35.Inner ring 17 is also to form one with slider 12.Slider 12, inner ring 17 constitutes one with outer wall 16 The shielding of hat.As described above, dynamic sealing 30 is located towards the axial end portion of the bearing block 9 of pump chambers 15, mainly prevents liquid Body enters the open space of bearing block 9 along armature spindle 5, hence into front chamber 11.

Slider 12 is the distance between close impeller 7, impeller 7 and slider less than the 4% of impeller diameter.So increase The hydraulic efficiency of wet impeller pump 1.

Wet impeller pump in working order under, liquid is from front chamber 11 by positioned at passage between seal pipe 2 and bearing block 9 14 flow to axial chamber 4.Additionally, the armature spindle 5 that liquid is rotated is conveyed by bearing clearance, and in an axial direction of bearing 10 End is flowed out, and is being flowed into therefrom positioned at a passage 13 between bearing 10 and bearing block 9, from some conduct of passage 13 The liquid of lubrication flows into bearing clearance in another axial end.From there through bearing clearance, the liquid generated in rotor chamber 4 is followed Ring.

Fig. 2 illustrates another embodiment of the wet impeller pump 1 of the present invention.Here, there is flexible barrier film using one The slider of 12a instead of the slider 12 of dimensionally stable, and barrier film 12a is with made by resilient material.

Barrier film 12a is fixed on inner ring 17, wherein, it is to be held firmly clamped to speed up in the collar of inner ring 17.In court To on the front of the shaft end of 7 direction outer wall of impeller 16, barrier film 12a loosely overlies, at least when impeller 7 rotates, thus make every Film 12a is liquid-tight part ground, but non-hermetic is forced on outer wall 16.This this have the advantage that, during pump 1 is filled up, The liquid conveyed by pump can enter rotor chamber 4 by a very little gap, and air can be in rotor chamber 4 or in ante-chamber The peak of room 11 overflows.Pump 1 in working order under, between pump chambers 15 and rotor chamber 4 formed a pressure differential, this pressure Power difference tightly presses against separator 12a on outer wall 16, while separator 12a is pressed against bearing block 9 including inner ring 17 In part 35.

In order to stablize barrier film 12a, outer wall 16 is joined together with coaxial inner ring 17 by radial direction cross bar 17a.When pump 1 Operationally, barrier film 12a can be pressed towards rear due to the pressure in pump chambers 15, therefore barrier film 12a can also lie in cross bar 17a On.

Fig. 3 shows wet impeller pump another the embodiment of the present invention.In this embodiment, bearing block is with double-walled Design.There is passage 34 between outer wall and inwall at one, wherein, outer wall is abutted on the inner side of seal pipe 2, sliding bearing 10 Abut on inwall with its periphery.Front chamber 11 be by passage 34 with communicatively link together to rotor chamber 4.Additionally, Bearing block 9 has a wheel rim 18 extended to outer wall at it towards the axial end of impeller 7, and wheel rim 18 is separated into front chamber 11 One cup 19 and a rear chamber 20, wherein, cup 19 is directed towards pump chambers 15, and rear chamber 20 is dorsad pump chambers 15.Wheel Edge 18 and outer wall 16 are shape all-in-one-pieces, and are transitioned in outer wall 16 by multiple junction points.Bearing block 9, wheel rim 18 and outer wall Therefore 16 form a co-molded part.There is opening 21,22 between junction point, cup 19 passes through these with rear chamber 20 Opening links together.Opening 21,22 is therefore in radially outer position so that slider 12 can almost completely by cup Circulating liquid in 19 comes through.

There is an area of space 23 towards the direction fractional open of armature spindle 5 in front chamber 11.In this area of space 23, leaf The band blade 27 of wheel 24,27 is fixed on armature spindle 5, and impeller 24 can cause the liquid of at least part radial direction to flow.Impeller 24 It is arranged between Simmer ring 30 and bearing 10, and positioned on armature spindle 5.

Armature spindle 5 is designed to a hollow axle, and with a centre bore 25 that can lead to liquid, the hole is in dorsad impeller The 7 end orientation of axle 5 is open, and is merged into therefrom in rotor chamber 4.Another end of armature spindle 5 is to close.Sealing Pipe 2 is closed in one end of its dorsad pump chambers 15 by bottom 31, so as to form a sealing pan.There is one again in bottom 31 The bearing 32 of support armature spindle 5.

In the axial direction of armature spindle 5, positioned at the position of armature spindle impeller 24, armature spindle 5 has one or more horizontal Hole 26, by transverse holes 26, liquid can pour into front chamber 11 by the centre bore 25 of armature spindle 5.

Here, the blade 27 of impeller 24 is extended to before transverse holes 26 in axial direction, so that suction is produced, thus Liquid in hollow axle 5 is gushed out.The liquid flowing of at least a portion radial direction can alone be caused by transverse holes 26, therefore impeller 24 is not indispensable.

Impeller 24 radially outward conveys liquid and through slider 12b, wherein, the heat of liquid is passed to slider On.Liquid is flowed into rear chamber 20 by the opening 21 and 22 in wheel rim 18 from cup 19, rear chamber 20 be by radial inlet 33 with Passage 34 in bearing block 9 connects together.Liquid enter in rotor chamber 4, and absorbs heat by import 33 and the stream of passage 34. At the back side of rotor chamber 4, liquid flows into the end of the opening of armature spindle 5, and flows to positioned at the position of impeller 24, both in armature spindle 5 Transverse holes, therefrom liquid flow out from armature spindle 5 again, flow through slider 12b, and in its heat transfer to slider. An effective and enclosed cooling system is defined by this way.

The amplification of impeller side bearing assembly is shown in accompanying drawing 4.

With reference to the accompanying drawings 3 with the embodiment of accompanying drawing 4 in, slider 12b is with having made by flexible sheet metal.It is wet In a quiescent state, that is, in the state of being not pressurized, 12b is in the whole area of its radially outer circumferential edges for isolation for impeller pump Domain and the front of outer wall 16 form gap, and wet impeller pump 1 in working order under, slider 12b is due to the pressure in pump chambers It is crushed on outer wall 16.When including the hydraulic system of pump 1 into working condition and being liquid filled, liquid can be by isolation Body 12 is infiltered and full of rotor chamber 4 with the gap of outer wall 16, while air can be escaped by this gap.

Used as the advantage for entering, in front chamber 11, particularly in cup 19, particulate matter and precipitate can sink Bottom, it is possible to rest on the inner side of outer wall 16.In order to these particulate matters can enter pump chambers 15, the inner side of outer wall 16 can be Incline towards the direction of impeller 7, the expansion scheme of this pump 1 does not show in the accompanying drawings.Particulate matter is under the slope for being formed It is sliding, pump chambers 15 are slipped into by gap, as long as the rearming of pump 1 one, particulate matter will be output again therefrom.

Claims (35)

1. wet impeller pump (1), with a stator (3) and rotor separated by seal pipe (2) and the stator (5,6), should Rotor includes an armature spindle (5) and a rotor combination (6), and rotor is rotatably supported on by seal pipe (2) institute shape Into rotor chamber (4) it is inner, wherein, armature spindle (5) an axial end portion with one promote liquid flowing impeller, this impeller (7) it is arranged in pump chambers (15), and seal pipe (2) has a flange for extending generally radially out in impeller side end (8) bearing block (9) with bearing (10), is set between seal pipe (2) and armature spindle (5), with support of rotor shaft (5), this bearing block is supported by seal pipe (2), it is characterised in that have a front chamber (11) between impeller (7) and flange (8), This front chamber towards impeller (7) direction is limited by a slider (12,12a, 12b), and is being towards stator (3) direction By flange (8) limit, wherein, front chamber (11) be by passage (13,14,34) connect with rotor chamber (4).

2. wet impeller pump (1) as claimed in claim 1, it is characterised in that at least wet impeller pump (1) in working order under, it is front Chamber (11) is being to close towards pump chambers (15) direction.

3. wet impeller pump (1) as claimed in claim 1 or 2, it is characterised in that and passage (13,14,34) positioned at bearing block (9) In, or between bearing block (9) and seal pipe (2), or between bearing (10) and bearing block (9).

4. wet impeller pump (1) as claimed in claim 1, it is characterised in that slider (12,12a, 12b) is a filter.

5. wet impeller pump (1) as claimed in claim 4, it is characterised in that at least one filter element is arranged on slider (12,12a, 12b) is inner.

6. wet impeller pump (1) as claimed in claim 4, it is characterised in that slider (12,12a, 12b) has network structure.

7. wet impeller pump (1) as claimed in claim 1, it is characterised in that front chamber (11) is managed in radially outward direction The restriction of section shape outer wall (16), this outer wall in a shaft end of the outer wall is linked together with flange (8), and this outer wall exists Another shaft end of the outer wall supports slider (12,12a, 12b).

8. wet impeller pump (1) as claimed in claim 7, it is characterised in that outer wall (16) closely againsts flange (8).

9. wet impeller pump (1) as claimed in claim 1, it is characterised in that front chamber (11) is being towards armature spindle (5) direction Sealing.

10. wet impeller pump (1) as claimed in claim 1, it is characterised in that slider (12,12a, 12b) is by Heat Conduction Material Made by.

11. wet impeller pumps (1) as claimed in claim 10, it is characterised in that slider (12,12a, 12b) is by metal system Into.

12. wet impeller pumps (1) as claimed in claim 1, it is characterised in that slider (12,12a, 12b) is at least partly by one It is individual to have flexible barrier film to be formed.

13. wet impeller pumps (1) as claimed in claim 7, it is characterised in that slider (12,12a, 12b) loosely lies in court On the front of outer wall (16) shaft end in impeller (7) direction.

14. wet impeller pumps (1) as claimed in claim 1, it is characterised in that front chamber (11) is towards armature spindle (5) direction At least partly limited by a coaxial inner ring (17), inner ring links together with bearing block (9), and inner ring supports isolation Body (12,12a, 12b).

15. wet impeller pumps (1) as claimed in claim 1, it is characterised in that impeller (7) and slider (12,12a, 12b) it Between distance be 0.015 times to 0.04 times of impeller diameter.

16. wet impeller pumps (1) as claimed in claim 1, it is characterised in that bearing block (9) and seal pipe (2) are to form one 's.

17. wet impeller pumps (1) as claimed in claim 1, it is characterised in that bearing block (9) and bearing (10) are to form one 's.

The 18. wet impeller pumps (1) as described in claim 1 or 17, it is characterised in that slider (12,12a, 12b) and bearing block (9), or at least inner ring (17) and bearing block (9) are shape all-in-one-pieces.

19. wet impeller pumps (1) as claimed in claim 14, it is characterised in that in order to consolidate slider (12,12a, 12b), outward Wall (16) is linked together by radial direction whippletree (17a) with coaxial inner ring (17).

20. wet impeller pumps (1) as claimed in claim 1, it is characterised in that wet impeller pump (1) in the state of being not pressurized, Front chamber (11) be towards pump chambers (15) direction it is open, and wet impeller pump (1) in working order under, front chamber is in direction Pump chambers direction is to close.

21. wet impeller pumps (1) as claimed in claim 7, it is characterised in that wet impeller pump (1) in the state of being not pressurized, every In vitro (12a, 12b) at least one portion region of its radially outside circumferential edges and outer wall (16) with spacing, so as to shape Into gap, and wet impeller pump (1) in working order under, slider (12a, 12b) is forced on outer wall (16).

22. wet impeller pumps (1) as claimed in claim 21, it is characterised in that wet impeller pump (1) in the state of being not pressurized, The circumferential edges of slider (12a, 12b) are located at ante-chamber relative to the spacing of outer wall (16) in the installation site of wet impeller pump (1) In the lower zone of room (11), the installation site is the installation site that wet impeller pump has horizontal rotor shaft (5), and outer wall (16) lower zone of the inner side at least in this formation bottom is downward-sloping towards impeller (7) direction, so as in front chamber (11) In drop to the granule of bottom and can continue to drop to pump chambers (15) by gap of the slider (12a, 12b) and outer wall between In.

The 23. wet impeller pumps (1) as described in claim 21 or 22, it is characterised in that wet impeller pump (1) is in non-pressurized state Under, slider (12a, 12b) forms gap, and wet rotor in the whole region of its radially outside circumferential edges with outer wall (16) Pump (1) in working order under, slider (12,12a, 12b) is forced on outer wall (16).

24. wet impeller pumps (1) as claimed in claim 22, it is characterised in that the inner side of outer wall (16) is fully towards impeller (7) direction inclines.

25. wet impeller pumps (1) as claimed in claim 1, it is characterised in that slider (12,12a, 12b) has increase surface Long-pending structural element.

26. wet impeller pumps (1) as claimed in claim 25, it is characterised in that structural element is positioned at slider towards ante-chamber The reverse side of room (11).

27. wet impeller pumps (1) as claimed in claim 1, it is characterised in that bearing block (9) it towards impeller (7) shaft end There is a wheel rim (18) extended towards outer wall (16) in portion, and this wheel rim (18) is divided into one towards pump chambers front chamber (11) (15) cup (19) and a rear chamber (20) back to pump chambers (15).

28. wet impeller pumps (1) as claimed in claim 27, it is characterised in that cup (19) and rear chamber (20) are by least One opening (21,22) interconnect.

29. wet impeller pumps (1) as claimed in claim 28, it is characterised in that in the inner single opening or many of front chamber (11) Individual opening (21, it is 22) to be located at radially outer position.

30. wet impeller pumps (1) as claimed in claim 1, it is characterised in that front chamber (11) has one towards armature spindle (5) The area of space (23) at least partly opening, in this area of space, another impeller of armature spindle (5) support (24,27), to produce Go out at least partially radial liquid flowing.

31. wet impeller pumps (1) as claimed in claim 1, it is characterised in that armature spindle (5) is one and can flow through with liquid Hole (25) hollow axle, this hollow axle is open in armature spindle (5) end of dorsad pump chambers (15), and from dorsad pump chamber The rotor shaft end of room leads to rotor chamber (4).

32. wet impeller pumps (1) as claimed in claim 31, it is characterised in that armature spindle (5) has one or more transverse holes (26), by transverse holes (26), the inner liquid of armature spindle (5) is flowed into front chamber (11).

33. wet impeller pumps (1) as claimed in claim 30, it is characterised in that another impeller (24,27) it is a turbine, Its turbo blade (27) is extended to before single transverse holes (26) or multiple transverse holes (26) in axial direction.

34. wet impeller pumps (1) as claimed in claim 7, it is characterised in that another shaft end of the outer wall in the outer wall Against slider or be integrated with slider.

35. wet impeller pumps (1) as claimed in claim 1, it is characterised in that front chamber (11) is towards armature spindle (5) direction At least partly limited by a coaxial inner ring (17), inner ring links together with bearing block (9), and inner ring and slider (12,12a, 12b) is integrated.