CN101790645A

CN101790645A - Rotary pump

Info

Publication number: CN101790645A
Application number: CN200880104639A
Authority: CN
Inventors: G·施特雷洛; A·艾希曼
Original assignee: Wilo SE
Current assignee: Wilo SE
Priority date: 2007-08-28
Filing date: 2008-08-25
Publication date: 2010-07-28
Anticipated expiration: 2028-08-25
Also published as: CN101790645B; EP2181264A1; WO2009030391A1; DE102007040461A1; EP2181264B1

Abstract

The present invention relates to a kind of rotary pump, the rotary pump of especially wet rotor structure form, the motor rotor of this rotary pump (7) surrounds with its axle (21) driven pump active wheel (5) and by motor stator (17), wherein, motor stator and pump wheel are surrounded by pump case and motor field frame (1,3), form an intermediate space (22,25) simultaneously, and the element (10,12,28) of at least one vibration damping is set in this intermediate space, and the element of vibration damping is bearing in motor stator (17) in the housing of pump case and motor.

Description

Rotary pump

Technical field

The present invention relates to a kind of rotary pump, the rotary pump of especially wet rotor structure form, the motor rotor of this rotary pump surrounds with its shaft driven pump active wheel and by motor stator.

Background technique

In order to be reduced in the discharging of airborne noise on the rotary pump and solid borne noise, be well known that, on each parts, take the measure of vibration damping, as on the bearing or on the head of slit.Confirmed already that these measures were especially under the miniature pump situation or not enough, or technical very luxurious the expense.It is very difficult particularly implementing known vibration reducing measure in miniature pump.

Summary of the invention

Task of the present invention is, in the rotary pump of the described type of beginning with structure on simple mode reduce airborne noise and solid borne noise discharging efficiently, and this is especially in the pump with little outside dimensions.In addition, task of the present invention is, sets up and being electrically connected of motor in simple mode.

According to the present invention, this task so solves, be that motor stator and pump wheel are surrounded by pump case and motor field frame, form an intermediate space simultaneously, and the element of at least one vibration damping is set in this intermediate space, and the element of vibration damping is bearing in motor stator in pump case and the motor field frame.

A kind of such solution means motor and outside pump case and the complete decoupling of motor field frame that has active wheel, obviously reduces the discharging of airborne noise and solid borne noise thus.Therefore can abandon the impact mitigation measure on each parts, because whole unit and system's decoupling.Keeping to reduce noise emission under the same precision situation of structure member, and/or under the same noise emission behaviour, can reduce requirement the structure member precision.This also just can mean, can use other motor technology of lower cost in case of necessity.Significantly be also advantageous in that in addition, do not produce the variation damping characteristics aspect relevant, because can not affact on the buffer element by the synthetic power of system pressure with system pressure.

Favourable form of implementation of the present invention is enumerated in the dependent claims.Allow especially simply design under high buffer function situation according to solution of the present invention, wherein such design produces favourable effect especially in the pump of minor structure.

Particularly advantageously be, the element of at least one vibration damping be conduction and being electrically connected of forming a kind of and pump motor.This not needing to cause cable in motor field frame.The present invention makes and abandons cable and become possibility, and cable can be delivered to the solid borne noise of motor on the housing.Also cancelled thus with the seal approach of cable when motor field frame is drawn.Simplified assembling in addition.

Thus, the material of the element of vibration damping can be the conduction and especially make by metal or by a kind of plastics of conduction.Suggestion alternatively, the material of the element of vibration damping is nonconducting and especially is made of plastics, and among the element of vibration damping or at least one electric lead is set.Preferably suggestion, the element and/or the electric lead of vibration damping have electric insulation layer.

Description of drawings

Shown in the drawings and the detailed description below of embodiments of the invention.Wherein:

Fig. 1 has first embodiment's of each vibration damper view between the motor field frame of motor stator and outside,

Fig. 2 has second embodiment's of springform moulding material view between motor stator and motor field frame,

The 3rd embodiment's that Fig. 3 is similar to Fig. 2 view has a spiral shaped housing that surrounds pump wheel, this spiral shaped housing and outside pump case 1 decoupling,

The 4th embodiment's that Fig. 4 is similar to Fig. 3 view has each vibration damper between the housing of the assembly of the inside that is made of spiral shaped housing and motor stator and the outside that is made of pump case and motor field frame,

Fig. 5 is as the 5th embodiment's of tubing pump view, and wherein Nei Bu assembly was streamed by the conveying liquid ring,

The 6th embodiment's that Fig. 6 is similar to Fig. 5 view, wherein pump wheel is not surrounded by the spiral shaped housing of inside,

Fig. 7 has the 7th embodiment's of conductie buffer element view.

Embodiment

In seven embodiments that illustrate, relate separately to the rotary pump of wet rotor structure form.In this case, motor stator 17 forms a columniform inner chamber 18, and this inner chamber is transferred the flow of liquid mistake, and rotor 7 is rotatably supported in this inner chamber with motor reel 21.In this case, stator 17 has the winding 6 that surrounds space 18, and these windings are by a kind of thermosetting plastics or thermoplastic foreskin, and motor forms a unit with its foreskin 11 like this, motor reel 21 comes out to enter into pump chamber from this unit, so that support pump wheel 5 there.

In two sides of foreskin 11, motor stator 17 is surrounded by motor inner housing 19.This housing 19 do not replace but can have and can pass through foreskin 11.In all embodiments, motor inner housing 19 is all as the parts of motor stator 17.

Motor stator 17 is surrounded like this by outside motor field frame 3 at a certain distance, consequently between stator 17 and the housing 3 around have an intermediate space 22.Fix each vibration damper especially as elastic element 10 in this intermediate space 22, these vibration dampers make stator 17 with respect to motor field frame 3 decouplings, are responsible for making the vibration that is produced by stator or rotor not to be delivered on the motor field frame 3 basically then.

The element of vibration damping can be made of a kind of gelatin.In this case, gelatin can constitute some by the element of bracket and/or the encirclement of intrinsic cortex.

Pump inner chamber 20 with outside pump case 1 is connected with intermediate space 22, and this outside pump case preferably constitutes spiral and has an axial suction port 23 and an exhaust port 24.Flow through the also through-flow intermediate space 22 of liquid of pump inner chamber 20 and therefore wash motor stator 17, so that not only cool off this motor stator in the inboard but also in the outside through rotor space 15 from the four sides.

Outside pump case 1 is connected through flanges 2 with the motor field frame 3 of outside.In addition, motor conjunction cable 4 is outwards drawn by the wall of exterior motor housing 3 through a Sealing 16.

Be that according to second embodiment of Fig. 2 and first embodiment's difference intermediate space 22 is partially or completely by a kind of flexible moulding material 12 fillings, this moulding material is with in the motor stator 17 buffering ground supportings motor field frame 3 externally.In this case, preferably, flexible moulding material 12 is liquid permeable, with this stator 17 is washed.In this case, moulding material can be made of a kind of foamed plastics of perforate.

Be that with difference according to the embodiment of Fig. 2 pump wheel 5 is surrounded by a spiral shaped housing 13 according to the 3rd embodiment of Fig. 3, this spiral shaped housing is fixed on the stator 17 and especially is fixed on the motor inner housing 19.In this case, form an intermediate space 25 between the pump case 1 of spiral shaped housing 13 and outside, this intermediate space surrounds spiral shaped housing 13 and is connected with intermediate space 22.A vibration damper 14 can be arranged in intermediate space 25, and this vibration damper constitutes sleeve shape Sealing and bridge joint and is connected with inlet between the suction port 26 in the motor inner housing at suction port 23.Exhaust port 27 in the spiral shaped housing 13 is not provided with such Sealing, so that from the liquid arrival

intermediate space

22 and 25 that spiral shaped housing 13 is discharged, side blow is washed spiral shaped housing 13 and stator 17 outside then.Therefore, in this embodiment, the pump assembly of whole inside, promptly drive unit, active wheel and hydraulic unit are surrounded and the flexible element of process and this housing decoupling by the

housing

1,3 of an outside.

Be with difference according to the 4th embodiment of Fig. 4 according to the embodiment of Fig. 3, motor stator 17 is not by a kind of moulding material of vibration damping (this material is permeable in case of necessity) encirclement, but as in first example, representing, by each especially vibration damper 10 maintenances of spring according to Fig. 1.

Be with difference according to the 5th embodiment of Fig. 5 according to the embodiment of Fig. 3, select the structural type of tubing pump, wherein carry liquid to flow to an exhaust port 24 with the through-flow intermediate space 22 of its whole amount, this exhaust port and suction port 23 are provided with the opposite side of motor pump with one heart.In this case, pump wheel 5 is surrounded by a spiral shaped housing 13, so that has both existed an intermediate space 22 also to have an intermediate space 25.Stator 17 is by

vibration damper

10,12b supporting on the other hand.In this case, vibration damper 10 can be used as mobile guiding device.

Described a tubing pump once more and only be there is not spiral shaped housing 13 according to the embodiment of Fig. 6 with difference according to the embodiment of Fig. 5.

The supporting of motor in filling with the motor field frame of hot water realizes by metal spring or plastics spring.The rigidity of spring is regulated like this, so that the natural frequency of flexibly mounted motor is below energizing frequency, then under transition point by decoupling.The material of spring has heat resistance and corrosion resistance.

In the embodiment show in figure 7, the material of the spring element 28 of vibration damping conducts electricity, and is especially made by metal or a kind of conductive plastic.Under the non electrically conductive material situation, an integrated like this lead 29, so that do not influence mechanical property.For this reason, utilize spring between motor and power supply and/or be arranged among the motor or on sensor set up and be electrically connected.Because spring is in water, thus some relative measures taked, so that spring and electric wiring are insulated with respect to medium.

So spring is born multinomial function,

-motor is bearing in the motor field frame

-mechanically make the motor decoupling

The power supply of-motor and/or as be positioned at motor among or on being electrically connected of sensor.

Claims

1. rotary pump, the rotary pump of especially wet rotor structure form, the motor rotor of this rotary pump (7) surrounds with its axle (19) driven pump active wheel (5) and by motor stator (17), it is characterized in that, motor stator (17) and pump wheel (5) are by pump case and motor field frame (1,3) surround, form an intermediate space (22 simultaneously, 25), and at this intermediate space (22, the element (10 of at least one vibration damping is set 25), 12,28), the element of vibration damping is bearing in pump case and motor field frame (1 with motor stator (17), 3) in.

2. pump as claimed in claim 1 is characterized in that, the element of vibration damping is made of each flexible element (10).

3. pump as claimed in claim 2 is characterized in that, flexible element (10) is a spring element.

4. pump as claimed in claim 2 is characterized in that, flexible element (10) is by elastomeric plastics or each element of being made by rubber.

5. as one of above-mentioned claim described pump, it is characterized in that the element of vibration damping is made of gelatin.

6. pump as claimed in claim 5 is characterized in that, gelatin constitutes by bracket and/or each element (10) of being surrounded by intrinsic cortex.

7. as one of above-mentioned claim described pump, it is characterized in that intermediate space (22) is partially or completely by a kind of flexible moulding material (12) filling.

8. pump as claimed in claim 7 is characterized in that, flexible moulding material (12) be liquid permeable or impermeable liquid.

9. as the described pump of one of above-mentioned claim, it is characterized in that intermediate space (22,25) is transferred medium and is full of especially and flows through.

10. as one of above-mentioned claim described pump, it is characterized in that motor stator (17) is by the mould material of electrical insulation (11) foreskin, this mould material is vacated intermediate space (22).

11., it is characterized in that pump wheel (5) is surrounded by a spiral shaped housing (13) as one of above-mentioned claim described pump, this spiral shaped housing is surrounded by the pump case of outside (1), forms intermediate space (25) simultaneously.

12. as one of above-mentioned claim described pump, it is characterized in that described pump is designed to tubing pump, wherein pump wheel (5) is carried by intermediate space (22,25) fed sheet of a media to exhaust port (24).

13. pump as claimed in claim 12 is characterized in that, flowed advantageously moulding and especially leading to mobile of the element of vibration damping (10,12,12b).

14., it is characterized in that electric wiring (4) is passed the element of at least one vibration damping and passed outside motor field frame (3) and outwards draw as one of above-mentioned claim described pump.

15. as the described rotary pump of one of above-mentioned claim, it is characterized in that, the element of at least one vibration damping (28) be conduction and being electrically connected of forming a kind of and pump motor.

16. rotary pump as claimed in claim 15 is characterized in that, the material of the element of vibration damping (28) be the conduction and especially make by metal or by a kind of plastics of conduction.

17. rotary pump as claimed in claim 15 is characterized in that, the material of the element of vibration damping (28) is nonconducting and especially is made of plastics, and at least one electric lead (29) is arranged among the element of vibration damping or on.

18., it is characterized in that element of vibration damping (28) and/or electric lead have electric insulation layer as the described rotary pump of one of claim 15 to 17.