CN205401207U - Motor pump - Google Patents

Abstract

The utility model provides a motor pump can will be detained rapidly in the air escape of the inboard that the main blade who carries the working solution took turns reliably. Motor pump possesses: the motor, by motor rotating driven rotation axis (1), be fixed in impeller (12) of rotation axis and dispose in the ring wall portion (30) of the top of impeller. Impeller (12) have: the main wing that goes on stepping up to the working solution and with intra vane (14) of ring wall portion (30) opposition configuration. Ring wall portion (30) divides the space of impeller (12) top into incline in interior week space (41) and periphery side space (42). Ring wall portion (30) have make that partly inside week side space (41) of utilizing the working solution that intra vane (14) radius vector carried to the outside returns return flow path (36), be provided with the stirring thrust in some of the inboard of intra vane (14) sides of impeller (12).

Description

Motor pump

Technical field

This utility model relates to the motor pump of the conveying of liquid.

Background technology

Submersible motor pump is widely used in being mixed with the conveying purposes of liquid of impurity, dirt as sewage, waste water, river.Generally, motor is arranged at the top of impeller.Therefore, under the situation that water level reduces, motor is to be exposed to the state operating in air.Even if for the cooling of also sufficiently conducted motor in such a state, and at the water jacket that is arranged around of motor, making liquid at water jacket internal recycle to cool down motor.

As the liquid of the cooling for motor, there is the working solution (becoming the liquid of the object conveyor of pump) of pump, cool down special coolant.When using the working solution of pump, dirt, impurity are piled up in water jacket, blocking water jacket, so that safeguard frequently.Therefore the demand of the water jacket employing special coolant is improved constantly.

When using coolant, it is necessary to the mechanism for make coolant to circulate different from the main impeller for transportation work liquid.As this cycling mechanism, it is proposed to the impeller of what a kind of utilization was different from main impeller the are arranged at rotating shaft mechanism to make coolant circulate.Coolant must be adequately isolated from motor and working solution.Additionally need to isolate motor from working solution.As the sealing mechanism isolated from working solution by motor, use the tandem mechanical sealing member of two mechanical sealing member arranged in series in the past.The scheme of a kind of impeller arranging cycling mechanism between the two mechanical sealing member is also proposed.But the tandem mechanical sealing member structure being assembled with impeller becomes complicated.Especially with the centrifugal impeller circulation impeller as coolant, it is necessary to the structure cost time on assembling.

It addition, in employing the cooling body of motor of coolant, in addition it is also necessary to make the mechanism that the heat captured from motor sheds to the circulation stream of coolant.It is proposed that coolant and working solution are carried out heat exchange via pump case by one, thus make the scheme that the heat of coolant sheds.But the size in the space between motor and pump case is restricted, therefore, it is difficult to guarantee the sufficient heat-conducting area for heat exchange.(such as, the inner side of main impeller etc., than main impeller position by the top) is easy it addition, in the receiving space of main impeller produces airtrapping.Such airtrapping becomes the reason hindering coolant and working solution to carry out heat exchange.It addition, airtrapping hinders lubrication and the cooling of mechanical sealing member, it is therefore possible to shorten the life-span of mechanical sealing member.

Patent documentation 1: Japanese Laid-Open Patent Publication 56-113093 publication

Patent documentation 2: Japanese Unexamined Patent Publication 11-325258 publication

Patent documentation 3: Japanese Unexamined Patent Publication 2000-110768 publication

Patent documentation 4: Japanese Unexamined Patent Publication 2011-163264 publication

Utility model content

The purpose of this utility model is in that, it is provided that a kind of motor pump that can be quickly and reliably discharged by the air being stranded in the inner side of the main impeller of transportation work liquid.

To achieve these goals, a mode of the present utility model relates to a kind of motor pump, it is characterised in that possess: motor；The rotating shaft driven is rotated by described motor；It is fixed on the impeller of described rotating shaft；And it is configured at the round rampart portion of the top of described impeller, described impeller has: the main wing that working solution is boosted, and the intra vane arranged opposite with described round rampart portion, the space of the top of described impeller is divided into space, inner circumferential side and outer circumferential side space by described round rampart portion, described round rampart portion has return stream, this return stream returns to space, described inner circumferential side for making a part for the described working solution utilizing described intra vane to carry to radial outside, a part in the inner side of the described intra vane side (face towards space, described inner circumferential side) of described impeller is provided with stirring thrust.

Preferred mode of the present utility model is characterised by, is provided with the baffle plate of the rotating flow hindering described working solution in space, described inner circumferential side.

Preferred mode of the present utility model is characterised by, described round rampart portion has rising stream, a part for the working solution utilizing described intra vane to carry to radial outside is guided upward by this rising stream from described intra vane, and described rising stream connects with described outer circumferential side space.

Preferred mode of the present utility model is characterised by, described round rampart portion is formed with the heat exchange stream carrying out heat exchange between described working solution and coolant, and described motor pump is also equipped with: surround the water jacket of described motor；And make the cycling mechanism that described coolant circulates between described water jacket and described heat exchange stream.

Other modes of the present utility model relate to a kind of motor pump, it is characterised in that possess: motor；The rotating shaft driven is rotated by described motor；It is fixed on the impeller of described rotating shaft；And it is configured at the round rampart portion of the top of described impeller, described impeller has: the main wing that working solution is boosted and the intra vane arranged opposite with described round rampart portion, the space of the top of described impeller is divided into space, inner circumferential side and outer circumferential side space by described round rampart portion, described round rampart portion has rising stream, a part for the working solution utilizing described intra vane to carry to radial outside is guided upward by this rising stream from described intra vane, and described rising stream connects with described outer circumferential side space.

Preferred mode of the present utility model is characterised by, described round rampart portion is formed with the heat exchange stream carrying out heat exchange between described working solution and coolant, and described motor pump is also equipped with: surround the water jacket of described motor；And make the cycling mechanism that described coolant circulates between described water jacket and described heat exchange stream.

By being arranged at the pumping action of the intra vane of the inner side of impeller, the air in the space of the top being stranded in impeller being stirred together with working solution, the air being therefore detained is discharged.It addition, also stir working solution after air is discharged and so as to circulate, therefore promote the heat exchange of coolant and working solution via circle rampart portion.Furthermore it is possible to prevent air from concentrating on central part (main shaft) periphery, therefore, it is possible to the problem avoiding the cooling deficiency of mechanical sealing member, dry operating etc.

Accompanying drawing explanation

Fig. 1 is the sectional view of the submersible motor pump of an embodiment of the present utility model.

Fig. 2 is the line A-A sectional view of Fig. 1.

Fig. 3 indicates that the amplification view of the tandem mechanical sealing member shown in Fig. 1 and pump case.

Fig. 4 (a) indicates that the top view of a part for main impeller, Fig. 4 (b) is the partial sectional view of main impeller, Fig. 4 (c) indicates that the top view of a part for the main impeller possessing stirring thrust, and Fig. 4 (d) is the partial sectional view of the main impeller possessing stirring thrust.

Fig. 5 (a) indicates that the top view of side plate, and Fig. 5 (b) indicates that the upward view of side plate, and Fig. 5 (c) is the line B-B sectional view of Fig. 5 (b).

Fig. 6 (a) indicates that the top view of inner shell, and Fig. 6 (b) is the line C-C sectional view of Fig. 6 (a), and Fig. 6 (c) indicates that the upward view of inner shell.

Fig. 7 (a) indicates that the top view of middle case, and Fig. 7 (b) indicates that the upward view of middle case, and Fig. 7 (c) is the line D-D sectional view of Fig. 7 (b).

Fig. 8 indicates that the exploded view of tandem mechanical sealing member.

Description of reference numerals: 1 ... rotating shaft；3 ... motor；8 ... outer housing；11 ... water jacket；12 ... main impeller；14 ... intra vane；20 ... centrifugal impeller；21 ... cellular rubber；23 ... demarcation strip；30 ... side plate；33 ... vertical guide wall；34 ... horizontal guiding wall；35 ... recess；36 ... through hole；37 ... baffle plate；50 ... inner shell；60 ... middle case；80 ... heat exchange stream；90 ... tandem mechanical sealing member；100 ... the first sealing unit；120 ... the second sealing unit；501a, 501b ... stirring thrust.

Detailed description of the invention

Fig. 1 is the sectional view of the submersible motor pump of an embodiment of the present utility model.Fig. 2 is the line A-A sectional view of Fig. 1.Motor drive shaft and pump shaft are formed integrally as rotating shaft 1.It is fixed with motor rotor 3a at rotating shaft 1, in the way of surrounding motor rotor 3a, is configured with motor stator 3b.Motor stator 3b is fixed on the inner peripheral surface of the motor shell 5 of cylindrical shape.Top cover 6 and bottom 7 are installed on the top of this motor shell 5 and bottom.In the closing space formed by motor shell 5, top cover 6 and bottom 7, house motor rotor 3a and motor stator 3b, thus constitute motor 3.

Top cover 6 and bottom 7 are provided with bearing 9, and rotating shaft 1 is rotatably supported by above-mentioned bearing 9.It is fixed with main impeller 12 in the end of rotating shaft 1.This main impeller 12 is contained in the volute 19 with Pump Suction Nozzle 19a and pump discharge 19b.Tandem mechanical sealing member 90 it is provided with between motor 3 and main impeller 12.Utilize this tandem mechanical sealing member 90 to prevent the working solution of pump from immersing motor 3.

Arranged outside at motor shell 5 has the outer housing 8 of cylindrical shape, is formed with space between motor shell 5 and outer housing 8.The water jacket 11 of the coolant flow for motor 3 it is made up of said motor shell 5 and outer housing 8.It is full of by coolant (being the anti-icing fluid such as ethylene glycol solution typically) in water jacket 11.Possess the centrifugal impeller 20 rotated integratedly with rotating shaft 1 at tandem mechanical sealing member 90, coolant is boosted because of the rotation of this centrifugal impeller 20.Coolant, after the working solution with pump has carried out heat exchange, is supplied to water jacket 11.Coolant after cooling down motor 3 in water jacket 11 again returns to centrifugal impeller 20.Such coolant circulates in centrifugal impeller 20 and water jacket 11.

Topmost at water jacket 11 is embedded with the cellular rubber 21 of the ring-type of independent foaming.The reason configuring this cellular rubber 21 is as follows.If there is air in water jacket 11, then air is involved in the liquid stream of coolant and causes coolant white casse so that cooling effectiveness slightly reduces.On the other hand, if being full of coolant in water jacket 11, then the change in volume of the coolant caused because of variations in temperature cannot be absorbed.Therefore, the cellular rubber 21 as flexible material block being made up of soft material coolant not infiltrated is arranged in water jacket 11.It addition, the reduction of the cooling effectiveness caused by the white casse of coolant is little, therefore when the cooling capacity of water jacket 11 is abundant, it is also possible to be not provided with flexible material block, and arrange air layer.

As in figure 2 it is shown, be provided with four rib 5a of longitudinal extension at the outer peripheral face of motor shell 5.It addition, four the demarcation strips 23 along the circumferential direction inner space of water jacket 11 divided are respectively arranged in four rib 5a.The inner peripheral surface of outer housing 8 can not also contact with demarcation strip 23.This demarcation strip 23 extends longitudinally to the position of regulation from the lower end of water jacket 11, forms four circulations stream 24A, 24B, 24C, 24D in water jacket 11.Article four, two past streams (representing with accompanying drawing labelling 24A, 24B) constituting coolant in circulation stream, other two the resurgent roads (representing with accompanying drawing labelling 24C, 24D) constituting coolant.Configuring axisymmetrically toward stream 24A, 24B, resurgent road 24C, 24D configure too axisymmetrically.

The cooling of motor 3 is carried out by carrying out heat exchange via motor shell 5 between coolant and the motor 3 of flowing in water jacket 11.Owing to the temperature of the coolant after motor 3 is cooled down rises, if therefore cannot coolant itself be cooled down, motor 3 can be overheated.Further contemplate via the outer housing 8 function of environment heat emission to the surrounding of water jacket 11, but sufficient heat radiation cannot be expected when outer housing 8 is exposed in air.Therefore as described below, it is desirable to be dispelled the heat fully by the heat exchange of coolant Yu the working solution of pump.

Owing to the mixing of coolant and working solution should be avoided, therefore carry out the heat exchange of coolant and working solution via certain parts (heat-exchanging part).That is, in the coolant heat exchanging process with working solution, the coefficient of overall heat transmission of coolant and working solution and heat-exchanging part becomes important.Generally, the more big heat then transmitted between fluid and object of heat transfer area is more big, and the more fast then coefficient of overall heat transmission of the speed of fluid is more big.If fluid flows in narrow stream, flow velocity accelerates, and the resistance of stream increases, and the pressure loss increases.Therefore as the circulation impeller 20 for coolant, it is preferable that be capable of the receded disk impeller of big lift relative to flow.In order to improve efficiency further, it is preferred to use closed type centrifugal impeller.

The impeller 20 that coolant circulates is made to be assembled in tandem mechanical sealing member 90.Tandem mechanical sealing member 90 is contained in the pump case being made up of side plate 30, inner shell 50 and middle case 60.Middle case 60 is fixed on bottom 7 and the bottom of outer housing 8.Inner shell 50 and side plate 30 utilize bolt 45,46 to be fixed on the bottom of middle case 60.Inner shell 50 is configured at the top of side plate 30.Volute 19 is fixed on the bottom of middle case 60, and the receiving space of main impeller 12 is formed by side plate 30 and volute 19.

Fig. 3 indicates that the amplification view of the tandem mechanical sealing member shown in Fig. 1 and pump case.As it is shown on figure 3, in the present embodiment, adopt closed type centrifugal impeller 20 as the circulation impeller of coolant.Centrifugal impeller 20 is located between inner shell 50 and side plate 30.It is formed with the heat exchange stream 80 launched between inner shell 50 and side plate 30 discoidly.More specifically, the upper surface of the lower surface of inner shell 50 Yu side plate 30 heat exchange stream 80 is formed.This heat exchange stream 80 extends from the fluid issuing of centrifugal impeller 20 to radial outside, is formed as circular during from end on observation.The fluid issuing of centrifugal impeller 20 is towards the entrance of this heat exchange stream 80, and the coolant discharged from centrifugal impeller 20 flows into heat exchange stream 80.The interval constituting the lower surface of inner shell 50 of the wall of heat exchange stream 80 and the upper surface of side plate 30 is narrower, and spread all over heat exchange stream 80 be integrally formed into interval constant.Therefore the sectional area of heat exchange stream 80 only extends together with radial location, and it is actually constant that the height of heat exchange stream 80 spreads all over its total length.

The outside axial flow path (the second axial flow path is interval) 84 that the inner side axial flow path (the first axial flow path is interval) 82 that heat exchange stream 80 is connected by the horizontal stream in inner side (the first radial flow path is interval) 81 streams 81 horizontal in inside this surrounding centrifugal impeller 20 is connected with the horizontal stream in the outside that axial flow path inside this 82 is connected (the second radial flow path is interval) 83 and stream 83 horizontal in outside this is constituted.The horizontal stream 81 in inner side has the shape of the smooth ring-type of extension from centrifugal impeller 20 to radial outside.From inner side, horizontal stream 81 axially extends inner side axial flow path 82 towards main impeller 12, and also extends to radial outside, has the shape of the substantially frustum of a cone as entirety.The horizontal stream 83 in outside has the shape of the smooth ring-type of extension from inner side axial flow path 82 to radial outside.From outside, horizontal stream 83 axially extends outside axial flow path 84 towards motor 3, and entirety has general cylindrical shape.

Inner side axial flow path 82 has the both sides of axial stream length and stream length radially, axial stream length be set to specific diameter to stream length longer.Inner side axial flow path 82 has stream length radially and is based on following reason.First reason be in order to suppress because of significantly alter from centrifugal impeller 20 out after the flow direction (from being radially orientated axially) of the coolant with bigger kinetic energy soon and the pressure loss that produces.If the second reason is because inner side axial flow path 82, only to have axial stream long, then the space (representing with accompanying drawing labelling 41) of the inner side across side plate 30 of heat exchange stream 80 narrows and working solution becomes easy delay.

The coolant boosted by centrifugal impeller 20 has the velocity component of direction of rotation.Owing to not interfering with this rotating flow such that it is able to will maintain higher as the side plate 30 of heat-exchanging part and the relative velocity of coolant.It addition, heat exchange stream 80 has the axial flow path interval extended substantially in the axial direction.In such axial flow path interval, flow path cross sectional area increases hardly.Therefore by arranging axial flow path interval, it is possible to suppress the speed of coolant to reduce, and guarantee bigger heat transfer area.Maximum radius for the heat exchange stream 80 of heat exchange is restricted because of the diameter of main impeller 12, the diameter etc. of motor 3, but by arranging the stream axially extended, it is possible to extend heat exchange stream 80.

Fig. 4 (a) indicates that the top view of a part for main impeller, and Fig. 4 (b) is the partial sectional view of main impeller.Main impeller 12 has the multiple main wings 13 for working solution is boosted.Main impeller 12 configures in the way of Pump Suction Nozzle 19a (with reference to Fig. 1) by above-mentioned main wing 13.Inner surface (upper surface) at main impeller 12 is provided with multiple intra vane 14.More specifically, the inner surface at main impeller 12 is provided with the multiple grooves 15 extended radially, is formed with intra vane 14 between above-mentioned groove 15.This intra vane 14 is arranged at equal intervals around the center of main impeller 12, as it is shown on figure 3, configure in the way of opposed with side plate 30.Intra vane 14 rotates together with main impeller 12, and the working solution around stirring side plate 30 is with so as to circulate, thus suppressing heat exchanger effectiveness to reduce.It addition, in the present embodiment, main impeller 12 is recited as the impeller constituting diagonal flow type centrifugal pump, but main impeller 12 is not limited to this example.

Fig. 4 (c) indicates that the top view of a part for the main impeller possessing stirring thrust, and Fig. 4 (d) is the partial sectional view of the main impeller possessing stirring thrust.The main structures such as main wing 13, intra vane 14 are identical with Fig. 4 (a), Fig. 4 (b).Fig. 4 (c), Fig. 4 (d) part in the inner side of intra vane 14 side (face towards space, inner circumferential side 41) of the main impeller 12 opposed with circle rampart portion 30 is provided with stirring thrust 501.In such a configuration, utilize stirring thrust 501 can the air that come together in central part (main shaft) periphery be stirred, and discharge together with working solution.

Fig. 5 (a) indicates that the top view of side plate, and Fig. 5 (b) indicates that the upward view of side plate, and Fig. 5 (c) is the line B-B sectional view of Fig. 5 (b).Side plate (circle rampart portion) 30 is shaped generally as circular shape.Upper surface at side plate 30 is formed with heat exchange stream 80, and working solution contacts with lower surface.Side plate 30 constitutes the heat-exchanging part carrying out coolant with the heat exchange of working solution.Side plate 30 is preferably made by the material that the coefficients of overall heat transmission such as bronze, pyrite are high.Side plate 30 bolt 46 is installed on middle case 60, only fixes the first standstill seal portion of tandem mechanical sealing member 90, owing to without supporting the weight such as motor 3, volute 19, thus allowing for the more weak material of strength ratio, shape.

Upper surface at side plate 30 is provided with inner side guide blades 31 and guided outside blade 32.Inner side guide blades 31 is positioned at the horizontal stream 81 in inner side, and guided outside blade 32 is positioned at the horizontal stream 83 in outside.The purpose that inner side guide blades 31 and guided outside blade 32 are the liquid stream arranging coolant is arranged.As shown in Fig. 5 (a), inner side guide blades 31 is less than the angle of the above-mentioned tangential direction relative to guided outside blade 32 relative to the angle of the tangential direction of the imaginary circle (not shown) concentrically arranged with rotating shaft 1, and inner side guide blades 31 does not hinder the rotation composition of coolant.

The upper surface (surface) of side plate 30 contacts with coolant, and the lower surface (inner surface) of side plate 30 contacts with working solution.Lower surface at side plate 30 is formed with the cylindric vertical extension wall 33 extended towards main impeller 12, and is provided with the horizontal extension wall 34 extended from the lower end of vertical extension wall 33 to radially inner side.Utilize above-mentioned prolongation wall 33,34 to increase the contact area of working solution and side plate 30, namely increase heat transfer area.Horizontal extension wall 34 configures in the way of opposed with intra vane 14.As shown in Figure 1 and Figure 3, the spatial separation of the top of main impeller 12 is space, inner circumferential side 41 and outer circumferential side space 42 by side plate 30.

A part for vertical extension wall 33 is formed as the shape caved in the inside, forms recess 35.This recess 35 constitutes a rising stream part for the working solution utilizing intra vane 14 to carry guided upward from intra vane 14 to radial outside.Recess 35 is towards intra vane 14 and outer circumferential side space 42.The inner of recess 35 is positioned at the position leaning on radial outside than the inner of opposed intra vane 14.Therefore, the working solution after being pressurizeed by intra vane 14 supplies to recess 35.Working solution after this pressurization is risen from intra vane 14 by recess 35, and flows on the outer peripheral face of side plate 30.The working solution that the liquid stream of this working solution is pointed in the outer circumferential side space 42 of the inner side of main impeller 12 is stirred with so as to circulate.

It addition, the part at horizontal extension wall 34 is provided with through hole 36.This through hole 36 constitutes return stream, and this return stream is for making a part for the working solution utilizing intra vane 14 to carry to radial outside return to space, inner circumferential side 41.The inner of through hole 36 is positioned at the position leaning on radial outside than the inner of opposed intra vane 14.Working solution after pressurizeing hence with intra vane 14 supplies to through hole 36.Working solution after this pressurization along the axial flowing of rotating shaft 1, be pointed to main impeller 12 inner side space, inner circumferential side 41 in working solution be stirred, so as to circulate.The liquid stream of this working solution has a rotation composition, but multiple baffle plates (rib) 37 of this rotated flowing liquid lower surface of being arranged at side plate 30 hinder, thus promoting the stirring of working solution further.Above-mentioned baffle plate 37 is configured to the vertical wall stretched out to radially inner side.

The stirring action of such working solution and Circulation, it is possible to prevent the delay of working solution with side plate 30 heat exchange, thus improving heat exchanger effectiveness.At the topmost in space, inner circumferential side 41 and outer circumferential side space 42, particularly easily produce airtrapping when pump operation start.The existence of such air not only reduces heat exchanger effectiveness, and the lubrication of mechanical sealing member is negatively affected.Owing to intra vane 14, through hole 36, recess 35, baffle plate 37 can be utilized to stir the working solution in above-mentioned space 41,42, therefore, it is possible to utilize the liquid stream of working solution to be discharged by the air accumulated.It addition, present embodiment is submersible motor pump, but the structure for effectively the air being stranded in the space of the inner side of main impeller 12 being discharged, it is also possible to it is applied to the pump beyond submersible motor pump.

Fig. 6 (a) indicates that the top view of inner shell, and Fig. 6 (b) is the line C-C sectional view of Fig. 6 (a), and Fig. 6 (c) indicates that the upward view of inner shell.Inner shell 50 has substantially circular shape.Upper surface at inner shell 50 is provided with a plurality of rib 51 extended radially.The inner surface of inner shell 50 and side plate 30 collectively form heat exchange stream 80.The inner circumferential end 52 of inner shell 50 becomes the grommet of centrifugal impeller 20.That is, the upper opening of inner shell 50 constitutes the circulation pump intake of coolant.

Fig. 7 (a) indicates that the top view of middle case, and Fig. 7 (b) indicates that the upward view of middle case, and Fig. 7 (c) is the line D-D sectional view of Fig. 7 (b).Upper surface at middle case 60 is provided with four openings (two entrance 61A, 61B, two outlets 61C, 61D), and above-mentioned opening 61A, 61B, 61C, 61D are circumferentially arranged at equal intervals.Entrance 61A, 61B are connected with resurgent road 24C, 24D of water jacket 11 respectively, and outlet 61C, 61D are connected with past stream 24A, 24B of water jacket 11 respectively.Two entrances 61A, 61B by by middle case 60 longitudinally through two inlet fluid path (suction stream) 62 and connect with the receiving space 64 of the central part of centrally located shell 60 bottom.This receiving space 64 is provided with mechanical sealing member 90, centrifugal impeller 20 etc..Two outlet 61C, 61D by by middle case 60 longitudinally through two outlet flow passage 63 and connect with two coolant outlets 65 of the lower surface being arranged at middle case 60 respectively.

In Fig. 7 (b) shown in dotted line, inlet fluid path 62 and the outlet flow passage 63 of middle case 60 are separated by two next doors 66 and are not interconnected.Two inlet fluid path 62 are interconnected by receiving space 64, and on the other hand, two outlet flow passage 63 are not interconnected but form independent stream.Two coolant outlets 65 are connected with a part for the terminal of heat exchange stream 80, and the coolant after being cooled down by working solution flows into water jacket 11 by outlet flow passage 63.Therefore constituted, with outlet flow passage 63, the discharge duct connected with water jacket 11 by centrifugal impeller 20 by heat exchange stream 80.

The terminal of heat exchange stream 80 is connected with the outlet flow passage 63 being arranged at middle case 60.The terminal of heat exchange stream 80 is ring-type, but outlet flow passage 63 is as it has been described above, be made up of two in four streams to be arranged in the way of through vertically by middle case 60.Outlet flow passage 63 is axisymmetric with the two of water jacket 11 to be connected toward stream 24A, 24B.Coolant cools down motor 3 in flowing vertically in stream 24A, 24B, collides with cellular rubber 21 and changes its flow direction, and declines in adjacent resurgent road 24C, 24D.Axisymmetric two resurgent roads 24C, 24D are connected with the two of middle case 60 inlet fluid path 62 (other two in four streams arranged in the way of through vertically by middle case 60) respectively, and coolant is guided to the suction inlet of centrifugal impeller 20.So, coolant circulates in centrifugal impeller 20, heat exchange stream 80, outlet flow passage 63, water jacket 11 (toward stream 24A, 24B and resurgent road 24C, 24D), inlet fluid path 62 and centrifugal impeller 20.

Fig. 8 indicates that the exploded view of tandem mechanical sealing member.The tandem mechanical sealing member 90 of present embodiment is by the first sealing unit 100 not possessing centrifugal impeller and possesses the second sealing unit 120 of centrifugal impeller 20 and constitutes.First sealing unit 100 and the second sealing unit 120 are configured to independent assembly, and can be separated from each other.

First sealing unit 100 possesses as rotary side key element: the first sleeve 102 being fixed on rotating shaft 1 and the first rotating seal ring 104 rotated integrally with this first sleeve 102 via pin 103.It is configured with o-ring 106 between the first sleeve 102 and the first rotating seal ring 104.Additionally, the first sealing unit 100 possesses as Stationary side key element: be fixed on the first fixing parts 107 of side plate 30 (framework of slewing), be supported in the first stationary seal ring 109 of these the first fixing parts 107 via o-ring 108 and the first stationary seal ring 109 is pressed on the spring 110 of the first rotating seal ring 104.It is fixing between parts 107 and the first stationary seal ring 109 that spring 110 is arranged in first.First stationary seal ring 109 utilizes holding section 111 to engage with the first fixing parts 107 so that the first stationary seal ring 109 does not rotate.Additionally in the present embodiment, the first stationary seal ring 109 and the first fixing parts 107 the first standstill seal portion is constituted.

First fixing parts the 107, first rotating seal ring 104 and the first stationary seal ring 109 configure in the way of surrounding the first sleeve 102.Outer peripheral face at the first sleeve 102, in the position that spring 110 does not extend into, and the first stationary seal ring 109 and the first fixing parts 107 engaging without departing from position back-up ring 115 is installed, this back-up ring 115 first fixing parts 107 to being produced by spring 110 limit relative to the displacement of the first sleeve 102.Even if when slewing is not provided with the first sealing unit 100, it is also possible to utilize this back-up ring 115 to maintain the state being assembled into one by the first sealing unit 100.Therefore only by the first fixing parts 107 are fixed on framework (side plate 30), just the first sealing unit 100 can be assembled in pump.Particularly before the first sealing unit 100 is assembled in pump, it is possible to terminate the para-position of holding section 111, pin 103 in advance, therefore the assembling of pump becomes easy.

Second sealing unit 120 possesses as Stationary side key element: is fixed on the second fixing parts 121 of middle case 60 (framework of slewing) and is supported in the second stationary seal ring 123 of these the second fixing parts 121 via o-ring 122.Second stationary seal ring 123 engages with the second fixing parts 121 via holding section 124, thus not rotating.It addition, in the present embodiment, the second stationary seal ring 123 and the second fixing parts 121 the second standstill seal portion is constituted.Additionally, the second sealing unit 120 possesses as rotary side key element: be fixed on the second sleeve 131 of rotating shaft 1 and the second rotating seal ring 132 that this second sleeve 131 rotates integrally and the second rotating seal ring 132 is pressed on the second stationary seal ring 123 spring 133.O-ring 134 has been clamped between the second sleeve 131 and the second rotating seal ring 132.

Second rotating seal ring 132 utilizes bolt 136 to link with the second sleeve 131.This bolt 136 is fixed on the second rotating seal ring 132, and slowly engages with the second sleeve 131.Second rotating seal ring 132 and bolt 136, it is possible to axially opposedly relative to the second sleeve 131 mobile.Bolt 136 is as the stop function that the second rotating seal ring 132 is limited relative to the displacement of the second sleeve 131.

Outer peripheral face at the second sleeve 131 is formed with centrifugal impeller 20.Centrifugal impeller 20 configures in the way of the fixing parts 121 of its fluid intake and second are opposed.(namely centrifugal impeller 20 is positioned at the sealing surface of the first sealing unit 100, the contact surface of the first rotating seal ring 104 and the first stationary seal ring 109) and the sealing surface (that is, the contact surface of the second rotating seal ring 132 and the second stationary seal ring 123) of the second sealing unit 120 between.Spring 133 is arranged at the jut of centrifugal impeller 20.Bolt 136 limits the displacement of the second rotating seal ring 132 produced because of the extension of spring 133, so even rotary side key element unassembled in slewing time, it is also possible to keep the state that rotary side key element is assembled into one.Additionally, the first sleeve 102 and the second sleeve 131 split are arranged, therefore the first sealing unit 100 and the second sealing unit 120 can be separated from each other as independent assembly.

The order that tandem mechanical sealing member 90 assembles to slewing is as follows.

1. with bolt 55 (with reference to Fig. 3), the Stationary side key element of the second sealing unit 120 is fixed on middle case 60.

2. with bolt 45 (with reference to Fig. 1), inner shell 50 is fixed on middle case 60.

3. at rotating shaft 1, wedge (key) 140 (with reference to Fig. 3) is installed, the rotary side key element of the second sealing unit 120 is installed on rotating shaft 1.

4. with bolt 46 (with reference to Fig. 1), side plate 30 is fixed on middle case 60.

5., in rotating shaft 1 mounting pin 141 (with reference to Fig. 3), with bolt 56 (with reference to Fig. 3), the first sealing unit 100 is fixed on side plate 30.

6. with bolt 47 (with reference to Fig. 1), main impeller 12 is fixed on rotating shaft 1.

By main impeller 12 is installed on rotating shaft 1, and the first sealing unit 100 and the second sealing unit 120 are exerted a force to the top of Fig. 3, thus spring 110,133 shrinks.As shown in Figure 8, it is formed with minor diameter part 102a in the bottom of the first sleeve 102, as it is shown on figure 3, the upper surface of this minor diameter part 102a (the first locating surface) 105 is connected to the first cascaded surface 1a of rotating shaft 1.The upper end of the first sleeve 102 is connected to the lower end of the second sleeve 131, and the upper surface of the second sleeve 131 (the second locating surface) 135 is connected to the second-order tread 1b of rotating shaft 1.Such first sleeve 102 and the second sleeve 131 are positioned.The revolving force of rotating shaft 1, via as the pin 141 of revolving force transfer part and wedge 140, is transferred to the first sleeve 102 and the second sleeve 131 respectively.

Need to arrange grommet at closed type centrifugal impeller 20.As can be seen from Figure 3, the diameter of the fluid intake of centrifugal impeller 20 is less, and therefore grommet must be arranged in the second fixing position between parts 121 and centrifugal impeller 20.In the present embodiment, second sealing unit 120 is made up of two the independent assemblies including Stationary side key element and rotary side key element, above-mentioned two assembly is configured to be assembled in respectively slewing, therefore, it is possible to be configured between Stationary side key element and centrifugal impeller 20 by grommet less for diameter.

Additionally, first sleeve 102 and the second sleeve 131 split are arranged, and the first sealing unit 100 can be made to separate with the second sealing unit 120, therefore it also is able to insert the framework (in this example for side plate 30) of pump to the space that the first of the first sealing unit 100 the fixing parts 107 and centrifugal impeller 20 clip.By this structure, it is possible to reduce the external diameter of mechanical sealing member.It addition, the fluid issuing position in the inner part that can will be inserted into by the side plate 30 of the high material molding of thermal conductivity than centrifugal impeller 20, therefore, it is possible to the heat exchange of the coolant that after reliably discharging via side plate 30, flow velocity soon is fast and working solution.

The people of the above-mentioned embodiment general knowledge to have this utility model art can implement to record for the purpose of this utility model.As long as those skilled in the art then can implement the various variation of above-mentioned embodiment certainly, technological thought of the present utility model can also be applied to other embodiments.Therefore this utility model is not limited to described embodiment, and should be interpreted that the maximum scope based on technological thought as defined in the claims.

Claims (6)

1. a motor pump, it is characterised in that possess:

Motor；

The rotating shaft driven is rotated by described motor；

It is fixed on the impeller of described rotating shaft；And

It is configured at the round rampart portion of the top of described impeller,

Described impeller has: the main wing that working solution is boosted and the intra vane arranged opposite with described round rampart portion,

The space of the top of described impeller is divided into space, inner circumferential side and outer circumferential side space by described round rampart portion,

Described round rampart portion has return stream, and this return stream is used for making a part for the described working solution utilizing described intra vane to carry to radial outside return to space, described inner circumferential side,

A part in the inner side of the described intra vane side of described impeller is provided with stirring thrust.

2. motor pump according to claim 1, it is characterised in that

The baffle plate of the rotating flow hindering described working solution it is provided with in space, described inner circumferential side.

3. motor pump according to claim 1 and 2, it is characterised in that

Described round rampart portion has rising stream, and a part for the working solution utilizing described intra vane to carry to radial outside is guided upward by this rising stream from described intra vane,

Described rising stream connects with described outer circumferential side space.

4. motor pump according to claim 1 and 2, it is characterised in that

Described round rampart portion is formed with the heat exchange stream carrying out heat exchange between described working solution and coolant,

Described motor pump is also equipped with:

Surround the water jacket of described motor；With

Make the cycling mechanism that described coolant circulates between described water jacket and described heat exchange stream.

5. a motor pump, it is characterised in that possess:

Motor；

The rotating shaft driven is rotated by described motor；

It is fixed on the impeller of described rotating shaft；And

It is configured at the round rampart portion of the top of described impeller,

Described impeller has: the main wing that working solution is boosted and the intra vane arranged opposite with described round rampart portion,

The space of the top of described impeller is divided into space, inner circumferential side and outer circumferential side space by described round rampart portion,

Described round rampart portion has rising stream, and a part for the working solution utilizing described intra vane to carry to radial outside is guided upward by this rising stream from described intra vane,

Described rising stream connects with described outer circumferential side space.

6. motor pump according to claim 5, it is characterised in that

Described round rampart portion is formed with the heat exchange stream carrying out heat exchange between described working solution and coolant,

Described motor pump is also equipped with:

Surround the water jacket of described motor；With

Make the cycling mechanism that described coolant circulates between described water jacket and described heat exchange stream.