CN2077050U

CN2077050U - Ring fully-sealing electric centrifugal pump

Info

Publication number: CN2077050U
Application number: CN 90206030
Authority: CN
Inventors: 丁嘉定; 丁肯
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-05-03
Filing date: 1990-05-03
Publication date: 1991-05-15

Abstract

Disclosed is a ring fully-sealing electric centrifugal pump which is formed by the combination of a water pump and an electromotor, and the ring fully-sealing electric centrifugal pump has simple and compact structure. The ring fully-sealing electric centrifugal pump mainly comprises a pump body, an impeller rotor, a fixing pump shaft and an impeller snail shell. The ring fully-sealing electric centrifugal pump is characterized in that the process of liquid pumping and transporting are fully sealed by reason that a pump shaft is fixedly embedded in the plastic pump body in order to avoid the tache of movable sealing and stop the leakage because of abrasion. The ring fully-sealing electric centrifugal pump makes an entire ring-shaped stator cast in the pump body by plastic, the wafer-shaped rotor is made to be an impeller, and the impeller is fixed on the pump shaft. The ring-shaped stator produces an end-surface rotating magnetic field, and at the same time the impeller produces electromagnetic induction. The impeller rotor produces rotating movement under the action of the electromagnetic force to pump liquid to work.

Description

Ring fully-sealing electric centrifugal pump

The utility model belongs to motor-drive pump and manufacturing field thereof.The utility model relates to a kind of improved electric centrifugal pump, and particularly in whole process of pumping liquid, any position of electric centrifugal pump does not have a bit leakage, fully sealing.Be applicable to industrial feedway as liquid.

The centrifugal pump structure of common electric can be divided into two parts, i.e. the motor power drive part and the pump housing part of pumping liquid.Two parts are linked together by coupling or rotating shaft.Impeller shaft has dynamic seal apparatus during by the pump housing.Because when impeller shaft rotates and dynamic seal apparatus have friction to exist, unavoidably to cause wearing and tearing, can not guarantee that the liquid of being pumped does not leak out.The liquid poisonous, deep-etching of particularly pumping serious environment pollution, harm life safety more can not have a bit leakage.So the common electric centrifugal pump can only be pumped the liquid that does not have environmental pollution and allow small leakage, application widely is restricted.

Task of the present utility model is: a kind of improved electric centrifugal pump is provided, and in whole process of pumping liquid, any overcurrent position of electric centrifugal pump does not have a bit leakage.Sealing fully.Unavoidable leakage problem when having solved long-standing electric centrifugal pump and pumping liquid.

The utility model is finished as follows, and the stator faces of annular end face motor is all sealed with plastics or epoxy resin, casts the pump housing.Inlaying fixedly pump shaft on the central axis of the pump housing, the disk shape rotor of annular end face motor is being made impeller.Impeller and rotor can disposable aluminium die casts.Also can make respectively to be screwed again behind impeller and the rotor and be glued together, claim vane rotor.Vane rotor is enclosed within on the outer ring of rolling bearing, and the inner ring of rolling bearing is enclosed within fixedly on the pump shaft, and vane rotor can rotate in the impeller spiral case automatically.The impeller spiral case is with there being gasket seal between the pump housing, they are assembled into an integral body, i.e. electric centrifugal pump assembly with screw.As shown in Figure 1.

The utility model is simple in structure, has only three parts, i.e. the pump housing, vane rotor, impeller spiral case.So low cost of manufacture is easy to use, is widely used.Be described in further detail below with reference to 1 pair of model utility of accompanying drawing:

Referring now to accompanying drawing 1, (3) are the annular end face stator core in motor, and its iron core is wound into annular with the 0.5mm silicon strip, and an end face has many radial grooves, and groove is embedded with staor winding (5).Whole stator is cast in the pump housing (1) by plastics or epoxy resin.The central axis of stator is with the central axes of the pump housing.The reeded end face of stator iron core is defined as the front-end face of the pump housing, and two end faces must be parallel, and nonparallelism will be in tolerance range.Pump housing front-end face generally between 0.10mm-5.00mm, that is to say that the seal protection layer thickness of stator front-end face can be in above-mentioned scope apart from the front-end face of stator.High-power motor also can thicken to 10.00mm-20.00mm.The staor winding lighting outlet is welded on the copper insert, exposes the pump housing as stator tenminal block (2).Shown in (2) in the accompanying drawing 1.

On the central axis of the pump housing, also inlaying fixedly pump shaft (11).Fixedly pump shaft passes stator inner hole, with the winding overhang of stator inner hole the above discharging gap of 3mm must be arranged, to guarantee safety.Fixedly the central axis of pump shaft must keep vertically with pump housing front-end face, and perpendicularity must be in tolerance range.Fixedly an end of pump shaft stretches out pump housing front-end face, as shown in Figure 1.Stretching out the inner ring that is with rolling bearing (10) on the fixedly pump shaft of front-end face.Vane rotor (8) is enclosed within on the outer ring of rolling bearing (10), and vane rotor leaves air clearance (12) with pump housing front-end face.

Vane rotor also is wound into annular core with the silicon strip of 0.5mm by circumferencial direction, at the end face of annular core many radial rotor grooves is arranged, and forms cast aluminium in the groove with machining or punching out.Cast each aluminum strip UNICOM in two annulus and the groove with aluminium at the inside and outside circle of rotor iron core.Aluminum strip and inside and outside circle aluminium annulus lump together forms the rotor end-face winding.This rotor profile size is radially big, axially little, becomes the disk shape.Impeller blade during cast aluminium (9) is with circle aluminium annulus cast solid in the rotor, and rotor has also just become impeller.Vane rotor hence obtains one's name.Fix with rotor with screw after the also available impact briquetting of impeller, be bonded into an integral body again.

Have impeller spiral case (7) covering in the outside of vane rotor, it also is the vitals of electric centrifugal pump, and it cooperates the formation pump chamber with the pump housing, play a part the sealing afflux, central axial direction has suction port (13), and the tangent direction of spiral case has exhaust port, as shown in drawings.

Electric centrifugal pump is worked as follows, and annular end face motor stator winding lighting outlet is welded on the copper insert, exposes the pump housing as the stator tenminal block.After the energising, stator produces the annular end face rotating magnetic field, and the magnetic line of force produces electromagnetic induction by stator faces sealed plastic layer and air clearance with vane rotor, and vane rotor rotatablely moves around fixing pump shaft generation under the effect of electromagnetic force, pumps the liquid work done.

The annular electric centrifugal pump can be accomplished hermetically sealedly in pumping the process of liquid, is because fixedly pump shaft is embedded in pump housing centre, is cast as one with the pump housing, has eliminated the motive sealing link between the pump shaft and the pump housing.Fixedly there have not been wearing and tearing and the problem of leaking between the pump shaft and the pump housing,, thoroughly solved and leaked this key problem in technology so stopped the generation of leaking from structure.Vane rotor and fixedly adopt rolling bearing between the pump shaft, as shown in Figure 1.Also can adopt sliding bearing, the motive sealing requirement is arranged between them, they are all in pump chamber inside, so do not influence the sealing of pump chamber.Remaining issues is exactly the sealing of the formed pump chamber in space between the impeller spiral case and the pump housing, and they are static seals, do not exist wearing and tearing to cause leakage, just can solve with common gasket seal (6), as shown in Figure 1, so the sealing of whole overcurrent position pump chamber, it all is standstill seal, got rid of dynamic seal apparatus, stopped the leakage that causes because of wearing and tearing, electric centrifugal pump is hermetically sealed to be guaranteed.

Claims

1, the hermetically sealed electronic centrifugal pump of a kind of annular, it is characterized in that: the stator faces of annular end face motor all seals with plastics or epoxy resin, cast the pump housing, inlaying fixedly pump shaft on the central axis of the pump housing, the disk shape rotor of annular end face motor is made impeller, claim vane rotor, vane rotor to be enclosed within fixedly on the pump shaft, can freely rotate in the impeller spiral case, the impeller spiral case is assembled into an integral body with the pump housing with screw.

2, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1; the stator faces of annular end face motor all seals with plastics or epoxy resin; it is characterized in that; the seal protection layer thickness of stator front between 0.10mm-5.00mm, high-power thickening between the 10.00mm-20.00mm.

3, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1, the stator faces of annular end face motor all seals with plastics or epoxy resin, it is characterized in that the staor winding lighting outlet is welded on the copper insert, expose the pump housing as the stator tenminal block.

4, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1 is being inlayed fixedly pump shaft on the central axis of the pump housing, it is characterized in that fixedly pump shaft passes stator inner hole, with the winding overhang of stator inner hole discharging gap more than the 3.00mm is arranged.

5, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1 is being inlayed fixedly pump shaft on the central axis of the pump housing, it is characterized in that, fixedly the central axis of pump shaft is with the central axes of the pump housing, and keeps vertical with pump housing front-end face.Fixedly an end of pump shaft stretches out pump housing front-end face.

6, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1 is made impeller to the disk shape rotor of annular end face motor, claims vane rotor, it is characterized in that impeller can be bonded into an integral body again with fixing with rotor with screw after punching press, the machine shaping.

7, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1 is made impeller to the disk shape rotor of annular end face motor, claims vane rotor.It is characterized in that vane rotor is wound into annular core with the silicon strip of 0.5mm by circumferencial direction, have many radial rotor grooves to form with machining or punching out at the end face of annular core.

8, as claim 1, the hermetically sealed electronic centrifugal pump of 7 described annulars, silicon strip is wound into annular core by circumferencial direction, end face at annular core has many radial grooves, it is characterized in that: cast aluminium in the groove, cast each aluminum strip UNICOM in two annulus and the groove with aluminium at the inside and outside circle of rotor iron core, aluminum strip and inside and outside circle aluminium annulus lump together forms the rotor end-face winding.

9, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1, vane rotor is characterized in that, and impeller blade can disposable aluminium die cast cast solid with circle aluminium annulus in the rotor, and rotor has also just become vane rotor.

10, the hermetically sealed electronic centrifugal pump of annular as claimed in claim 1, vane rotor is enclosed within fixedly on the pump shaft, can in the impeller spiral case, freely rotate, it is characterized in that, fixedly overlapping the inner ring of rolling bearing on the pump shaft, vane rotor is enclosed within on the outer ring of rolling bearing, and vane rotor leaves the air clearance with pump housing front end.