CN1249357C

CN1249357C - Centrifugical pump

Info

Publication number: CN1249357C
Application number: CN 00105351
Authority: CN
Inventors: 尼尔斯·迪尤·延森; 约恩·施密特
Original assignee: GRENDEFUSH UNION AS
Current assignee: GRENDEFUSH UNION AS
Priority date: 1999-03-31
Filing date: 2000-03-30
Publication date: 2006-04-05
Anticipated expiration: 2020-03-30
Also published as: AR022942A1; DE19914579C2; CN1268628A; TW460658B; DE19914579A1

Abstract

The centrifugal pump unit comprises a canned motor with a canned cap which seals the motor winding with respect to the rotor space. The motor is arranged within a motor housing to which there axially connects a pump housing in which there runs an impeller driven by a motor. In the region between the canned cap and the pump housing there are provided sealing means. Between the motor housing and the pump housing there is arranged an adapter, wherein between the adapter and the pump housing there are provided sealing means as well as between the canned cap and the adapter. With the help of this adapter a motor as is known from heating circulatory pumps, with a circumferentially significantly larger pump housing and thus also larger impeller, may be used.

Description

Centrifugal pump

Technical field

The present invention relates to a kind of centrifugal pump.

Background technique

Now, this centrifugal pump generally uses as the Heating Cyclic pump, and is made in a large number, and tens thousand of batches is for example arranged every day.They comprise a hermetically-sealed motor, in its sealing cover, are rotating the rotor that is installed on the live axle.Motor winding and the fluid isolation that is filled in the rotor space, wherein, mainly the pump case that is connected with this Heating Cyclic pump flushes with motor field frame on extending axially partly.

Some place in the world, the place that sufficiently high working pressure is not particularly always arranged at the center water supply station, normally water storage box is installed on (for example) roof, put into water then from the center water supply station, until the certain altitude that rises to water storage box, in the time of needs water, make water flow to water intaking position in its lower section the room thus.Utilize this method, when the discharge pressure in the water supply line of center reduces or stops to carry, also can obtain water.Because the static pressure that height difference forms between water storage box and the water intaking position is almost very little, therefore when use needs electronic or pneumatic water heater that minimal amount of water passes through or similar devices, must use so-called booster pump.This make the pump that increases from the hydraulic pressure of water storage box relatively per hour 0.5 to 1 cubic metre the flow pressure that has 0.6 to 0.8 crust (bar) usually increase.

With regard to design and fabrication technology, making this existing suitable pump may be without any problem.Yet for new design and the present number of components that needs, higher cost can be estimated, because may only need these pumps of small lot or medium batch.

Therefore known booster pump has the drive motor that is designed to the dry type rotor, and between pump and motor regional sealed need be provided.The sealing of axle is formed by axial end Sealing or lip packing, and this Sealing can be worn as time goes by and behind certain hour, thereby must transposing.For this reason, pump case must be unloaded, the pump assembly must be decomposed in other words.In addition, the noise of the driver that dry type is rotated is bigger, and this noise is annoying especially in the residential quarter.

Summary of the invention

At this technical background, the objective of the invention is to design a kind of centrifugal pump, specifically, it can be used as booster pump and uses, and it is durable and maintenance expenses is lower on the one hand, and it is also more cheap when small lot or medium batch process on the other hand.

The object of the present invention is achieved like this, and a kind of centrifugal pump is provided, and it has the hermetically-sealed motor of with closure, and the sealing lid makes the motor winding seal with respect to rotor space; Axially motor field frame and the pump case that connects is installed with in pump case and electric motor driven impeller; And between sealing cover and pump case the zone in Sealing.Wherein, one ABAP Adapter is installed between motor field frame and pump case, this ABAP Adapter comprises a bearing surface that is used for pump case and is used for sealing cover and another bearing surface at least of motor field frame, and between ABAP Adapter and the pump case and between ABAP Adapter and the sealing cover Sealing is being installed.

Basic principle of the present invention is the actuator part that forms as the wet type rotor, and use usually as the hermetically-sealed motor use of Heating Cyclic pump, the centrifugal pump of making in enormous quantities, when being used as the booster pump use, because this driver can cheaply obtain because of in enormous quantities the manufacturing on the one hand, rotor space because of the filling fluid is need not to keep in repair very durable on the other hand, so it is useful especially for above-mentioned application purpose.In addition, thus the wet type rotating operation has the lower advantage of noise of working in relatively moister environment.

If the motor that wish to adopt the wet type of immovable Heating Cyclic pump to rotate is selected single stage centrifugal pump (because cost is not considered multistage centrifugal pump here) then, 10 rev/mins specific speed of rotation or lower will be caused.Above-mentioned when using, when having 3000 rev/mins the driver of Heating Cyclic pump of rated speed, will make impeller have the highest (D2=external diameter, D1=internal diameter) inner and outer diameter ratio that is approximately 6 D2 than D1.To make impeller have the corresponding even bigger external diameter of external diameter with motor field frame thus.This will have such result, that the Heating Cyclic pump usually connects and with motor field frame pump case that circumference aligns will than before big, at least in pump case because cost former thereby be in demand when forming a monomer in fact.For the pump case with this size is connected on the smaller motor field frame, and connect sealing cover in a suitable manner, the present invention has designed a kind of ABAP Adapter, its side is connected with sealing cover by Sealing, and be connected with pump case by Sealing on the other hand, be about to it and be installed between motor field frame and the pump case.

This ABAP Adapter preferably forms a loop configuration, and like this, the structural member of motor can remain unchanged, and pump case is at design aspect, can finish easily aspect the ring joint part especially.

This ABAP Adapter can form at an easy rate with thin plate, at first stamps out a flat ring, forms suitable step then therein, forms above-mentioned bearing surface and guide hole radially thereof thus.

Usually, bearing surface forms flange shape, wherein, provides a medial flange with the corresponding outboard flanges on the supporting sealing cover, and an outboard flanges is to be bearing in the pump assembly on the ABAP Adapter.

Usually, described medial flange is to form like this, and it is formed with at least one projection that extends radially inwardly, the shape of lug ringwise for example, and also be used for fixing support plate at the same time, this support plate is installed between rotor space and the pump space usually, and admits the bearing of the axle of impeller one side.

Connection between pump case and the motor field frame realizes easily that by pull bar pull bar imports from the outer side of motor field frame, thereby ABAP Adapter is fixed between pump case and the motor field frame.By these pull bars, also can apply needed pressure between pump case and the ABAP Adapter and on the Sealing of ABAP Adapter and sealing cover medial flange.

Description of drawings

Embodiment below with reference to the accompanying drawings describes the present invention in detail.

Fig. 1 is the longitudinal sectional view according to a centrifugal pump of the present invention;

Fig. 2 is another longitudinal sectional view of the centrifugal pump of different orientation;

Fig. 3 is a stereogram of seeing ABAP Adapter in the past from oblique upper.

Centrifugal pump shown in Fig. 1 and 2 comprises motor field frame 1 and pump case 2, and they are connected to each other by ABAP Adapter 3.

Embodiment

Motor field frame is installed with stator 4 for 1 li, it inboard and towards a side of ABAP Adapter 3 by sealing cover 5 sealings.Sealing cover 5 is formed by thin plate, and comprises stepped shape flange 6, and flange 6 supports the medial flange 8 of ABAP Adapter 3 with annular flat Sealing 7.

Rotor 9 is in 5 li rotations of sealing cover, and the axle 10 of rotor 9 is by two

bearings

11 and 12 supportings.Rear bearing 11 is fixed on the base of sealing cover by central ring 13.Fore bearing 12 is fixing by the positioning ring 14 as support plate, and positioning ring 14 is also formed by thin plate, and its outboard flanges is between the inside protrusions 15 of lip seal 7 and ABAP Adapter 3 medial flange 8.In of flange 6 supportings of this regional lip seal 7 by sealing cover 5.

Pump side one end of axle 10 is installed an impeller 16 firmly, and impeller 16 is known from accompanying drawing in 2 li rotations of pump case, pump case body image one helical housing.Impeller 16 at an abaxial side shaft to charging into import 17, and import 17 lead to radially away from, at the suction attachment 18 on pump case side.From Fig. 1, also can see one radially away from compression fittings 19, it is formed at the end of helical housing, flushes with the outer periphery of impeller 16.

Pump case 2 is formed by the high pressure die casting part of plastics, comprises end face side bearing surface 20, and it aligns with motor field frame, and side has the groove that holds O shape ring 21 within it.End face side bearing surface 20 can be used to support the outboard flanges 22 of ABAP Adapter 3, and O shape ring is between the part in the outboard flanges 22 of the groove of pump case 2 bearing surfaces 20 and ABAP Adapter 3 and ABAP Adapter 3 cylindrical shape districts 23, these cylindrical shape district 23 connection outboard flanges 22 and medial flange 8.This cylindrical shape district 23 makes ABAP Adapter 3 be positioned at the center of pump case 2.

Motor field frame 1 always has 4 radial lobes 24 on its outer periphery, each lug 24 be provided with ABAP Adapter 3 on corresponding aperture 26 and the hole 25 (Fig. 3) of aliging, the hole 27 on the pump case 2.Each hole 27 has internal thread, so that match with the pull bar 28 of bolt shape, the head of pull bar 28 is near a suitable bearing surface (seeing Fig. 2 for details) of lug 24.By

lug

24 and 4 bolts 28, motor field frame 1 is screwed onto on the pump case 2, and two

housings

1 and 2 ABAP Adapter 3 sealed to each other are fixed, and the flange 6 and the positioning ring 14 of sealing cover 5 is fixed on its outboard flanges.

From Fig. 3, can see, be formed with on the outboard flanges of ABAP Adapter 3 and the corresponding structure of lug 24 on the motor field frame 1, and in addition also be circular.ABAP Adapter 3 is formed by the sheet stamping part.

Claims

1. centrifugal pump, it has the hermetically-sealed motor of with closure (5), and the sealing lid makes motor winding (4) seal with respect to rotor space; Axially motor field frame (1) and the pump case (2) that connects is installed with in pump case by electric motor driven impeller (16); And between sealing cover (5) and pump case (2) zone in Sealing; It is characterized in that, one ABAP Adapter (3) is installed between motor field frame (1) and pump case (2), this ABAP Adapter comprises a bearing surface that is used for pump case (2) and is used for sealing cover (5) and another bearing surface at least of motor field frame (1), and between ABAP Adapter (3) and the pump case (2) and between ABAP Adapter (3) and the sealing cover (5) Sealing (21,7) is being installed.

2. centrifugal pump as claimed in claim 1 is characterized in that, ABAP Adapter (3) ringwise.

3. the described centrifugal pump of one of claim as described above is characterized in that ABAP Adapter (3) is formed by a thin plate.

4. centrifugal pump as claimed in claim 1 is characterized in that, ABAP Adapter (3) comprises an outboard flanges (22), is formed with the bearing surface that is used for pump case (2) on this outboard flanges.

5. centrifugal pump as claimed in claim 1 is characterized in that, ABAP Adapter (3) comprises a medial flange (8), and this medial flange is formed with the bearing surface that is used for sealing cover (5).

6. centrifugal pump as claimed in claim 5 is characterized in that, a support plate (14) is installed between rotor space and pump space, and goes up setting projection (15) that extend radially inwardly, that be used for fixing support plate (14) in medial flange (8).

7. centrifugal pump as claimed in claim 1 is characterized in that, motor field frame (1) and pump case (2) are fastened to each other and fixing with ABAP Adapter (3) by pull bar (28).