CN107002668B - Length compensation device - Google Patents
Length compensation device Download PDFInfo
- Publication number
- CN107002668B CN107002668B CN201580066076.7A CN201580066076A CN107002668B CN 107002668 B CN107002668 B CN 107002668B CN 201580066076 A CN201580066076 A CN 201580066076A CN 107002668 B CN107002668 B CN 107002668B
- Authority
- CN
- China
- Prior art keywords
- utricule
- supporter
- compensation device
- length compensation
- stator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
- F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
- F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
- F04C2/1075—Construction of the stationary member
Abstract
Length compensation device (4), particularly for the eccentrie helical totorpump for the stator (2) being adjusted axially with rotor and energy edge, which should be designed for reliably and efficiently compensating length variation.To this, according to the present invention, length compensation device (4) includes at least one along axial mobilizable supporter (10,12), and the utricule (16) for supporter (10,12) distribution is arranged in the supporter to guide pumped (conveying) medium.
Description
Technical field
The present invention relates to a kind of length compensation device, particularly for rotor and can be along the inclined of the stator being adjusted axially
Heart screw pump, wherein length compensation device is distributed into stator.The invention further relates to the eccentric screws with length compensation device
Pump.
Background technique
Eccentrie helical totorpump belongs to revolvable positive displacement pump, and pump section has revolvable component (rotor) and fixes not
Dynamic component (stator).Here, rotor is configured with the spiral shell of big screw pitch and the depth of thread and relatively small core diameters
Follow closely shape.Stator has the screw pitch bigger than rotor and the depth of thread that has is twice of rotor.As a result, in rotor and calmly
Conveying space is formed between son, which continuously moves from approaching side towards discharge side.Usual stator is by elastomer and packet
The stator outer housing for enclosing elastomer is constituted.Elastomer realizes sealing between rotor and stator, by the Internal periphery for making stator
Outer profile less than rotor generates the sealing.Continual seal line is formed by pre-tightening, it is empty to seal the conveying being successively connected
Between and realize the building of discharge pressure.
In order to improve service life and in order to match different service conditions, prior art discloses some realization sides
Case, wherein, elastic stator can be along being adjusted axially or readjust.For example, DE1303705 discloses a kind of eccentric screw
Pump, stator interior diameter can be narrowed by squeezing, wherein and the inner walls of elastic stator and outer surface construction are tapered, and
And stator can be adjusted axially on edge in the housing.Compensating element, is set between pump case and stator.Thus it should realize, compared with long running
After time wear phenomenon can be compensated in the axial direction and readjusting stator.
Can according to be in the presence of during operation adjust stator inside dimension eccentrie helical totorpump by
Known to DE102005042559A1.In this regard, the elastic stator liner that eccentrie helical totorpump has stator outer housing and is arranged therein,
Wherein, it is arranged on two ends of the stator liner of elasticity for the backstop along axial restriction end, and at least at one
Change the axial position of backstop on end there are device.Pulling force or pressure are applied to elasticity by adjusting stator outer housing
On stator liner, thus changes the pressure being applied on rotor and therefore change preload.Thus the interior cross section of adjustable bushing.
In order to guarantee the adjusting to stator, the device compensated for stator length is needed.It is being known from the state of the art
Implementation in, to this for example using adjustment ring or compensation gasket, wherein adjustment ring may also be arranged in moving adjustment dress
In setting, can also to be advantageously applied on stator liner during pump operation.
In this regard, adjustment ring is contacted with pumped (conveying) medium, it is therefore desirable to which device can ensure outside adjustment ring and pump case or stator
Sealing between cover.It is expected that this compensation device, which can compensate the length of stator based on being adjusted axially
Degree variation, and the component of compensation device is not contacted with pumped (conveying) medium.Compensation device preferably should also be realized to the axially directed of stator.
But the implementation for the above-mentioned type being known from the state of the art is less suitable to this.
Summary of the invention
It is a kind of for guiding the length compensation device of pumped (conveying) medium therefore, the purpose of the present invention is to propose, by the length
Compensation device can efficiently and reliably realize the length variation of the especially stator of eccentrie helical totorpump.
The purpose is accomplished by the following way according to the present invention, that is, length compensation device includes that at least one can along axial direction
Movable supporter, the utricule for supporter distribution are arranged in supporter to guide pumped (conveying) medium.
In this regard, the present invention is since such design, that is, length compensation device or its component are vulnerable to pollution, therefore
It should not be in contact with pumped (conveying) medium.Friction and wear can be made to be kept as very low by using greasing substance and improve sealing
Effect.It should also be avoided as much as herein, as operating oil and grease is not for example due to sealing part abrasion and close with material
Envelope property and possibly into pumped (conveying) medium.
This is accomplished by the following way, that is, length compensation device has supporter, and supporter is not contacted with pumped (conveying) medium.
Utricule is disposed within supporter, utricule is contacted with pumped (conveying) medium, and pumped (conveying) medium may flow through utricule.In order in capsule
The support to utricule is realized when body is axially moved, when utricule stretches or compresses, and supporter is configured to, so that the supporter can
Implement the axial movement of utricule together.Whole length compensation device advantageously can be stretched or be compressed as a result,.For example, utricule
It can be contacted with supporter, so as to be supported directly on utricule on supporter.
But in order to realize that support function can also be such that utricule couples via suitable device with supporter.In this regard, supporter
It is preferred that coupling with utricule pressure seal, so that forming fluid cavity between supporter and utricule, fluid cavity is in radial directions
Support utricule.Utricule is not subjected to the pressure load that shape can be made to change as a result, and therefore keeps dimensionally stable substantially.
In preferred improvement project, in order to measure the pressure sensor that fluid cavity is distributed in pump pressure setting.Pressure
Thus sensor is not contacted with pumped (conveying) medium in an advantageous manner, and measuring device will not for example block.Therefore, in fluid cavity
In fluid be used as pressure converter for detecting pressure, and also be used as superpressure safety device.
Supporter can be formed by one or more compensating element,s, wherein compensating element, itself couples to pressure seal each other.
Utricule is preferably made of the plastics of elastically deformable, the flexible deformation when adjusting stator.Supporter for example can be by
Metal material, with fold scrotiform formula, be configured to compensate for element one-piece.Fold capsule has sufficiently large radial rigidity herein,
So as to bear to be applied to the pressure on utricule.
Preferably, utricule has funnel shaped, wherein the utricule is tapered towards pump.It is thus achieved that even if utricule
Also having under compression makes to flow optimal shape.Further, since special shape realizes the tight of length compensation device
Gather structure, because utricule can be rolled up inwards in compression, and this for example can not be achieved in the case where simple fold capsule, by
Even if utricule is also required to relatively large space in the axial direction under compression for this.
Preferably, length compensation device is arranged in product discharge side.Therefore, advantageously, dress according to the present invention is being constructed
Still the arrangement and make that consider the driving element of pump side are not had to when setting.
In particularly preferred embodiments, it is right to be configured to cylinder-piston-for supporter, so that as the first external compensation member
The cylinder of part couples with the piston pressure seal as the second internal compensation element, this is used for by introducing preferably in piston
The recess of sealing element is completed.In this regard, piston and cylinder are preferably configured to, supporter is also used as guiding piece.Thus it can use
The support and guidance to disappear in product side to stator.
In preferred variant schemes, utricule has theoretical fold position.It can advantageously be influenced by theoretical fold position
Shape of the utricule in its compression.Theoretical fold position can for example generate in the following manner, that is, utricule has the basic of determination
Shape, and/or by increasing or reducing the material thickness at the position being arranged thus or at region.But it is also contemplated that installation
Or auxiliary element for example in a curved state is introduced, ring extends around utricule in fluid cavity side wall and forms theoretical fold position or ring
Around theoretical fold line.
In particularly advantageous design scheme, utricule has adjacent to each other in the axial direction, around utricule extension
Face, transition part form theoretical fold position or theoretical fold line.For this purpose, the plane formula region of utricule can have different materials
Thickness and/or arranged to be angularly disposed with respect to each other.
According to preferred improvement project, in order to regulate and control the fluid within fluid cavity, there is supporter at least one can close
Opening or valve.Preferably, fluid is filled into fluid cavity by valve, wherein can be discharged on the opposite site of supporter
The air squeezed by fluid.
Preferably, the Fluid Volume in fluid cavity is regulatable, can extraly influence the shape and compression of utricule
Performance.To this settable control device, control device can increase or decrease the pressure in fluid cavity according to the pump parameter of measurement.
It is particularly preferred that utricule, which is configured to length compensation device, can serve additionally as disabling mechanism.In this regard, utricule is by height
The elastomer of elasticity is constituted.In order to end, such as by controllable pressure source pressure is improved in fluid cavity, until utricule becomes
Channel in shape and seal length compensation device.It is thus achieved that such as without additional disabling mechanism can pump or
Installment work is carried out at conveying equipment.
In particular, in that, pass through the isolation by utricule, the utricule particularly by elastomer by the advantages of realizing of the invention
So that the medium flowed through is not contacted with supporter, typically without with its sealing element.It is formed between utricule and supporter
Cavity can be filled with the fluid of lubricating action, and sealing element and guiding piece are thus protected in a manner of pcrmanent lubrication, is worn from height.
It is further possible to using the utricule of opposite thin-walled, it is negative by making utricule bear the smaller high pressure that can substantially change shape
Thus lotus is further improved its fold performance.Since the funnel shaped of utricule realizes especially short structure type, because of utricule
It itself can be to curls inward.It is further advantageous that only utricule is (as wear-out part or with determining physically or chemically characteristic and right
The component of the requirement of pumped (conveying) medium) it can be provided for simple replacement of, without replacing whole length compensation device.
Detailed description of the invention
The embodiment that the present invention will be described in detail with reference to the accompanying drawings.Wherein, it shows:
Fig. 1 schematically shows the stator of eccentrie helical totorpump, has in the length compensation device on the pressure side connected, should
Length compensation device include utricule and surround the utricule cylinder-piston-it is right, the cylinder-piston-to as supporter,
Fig. 2 shows the length compensation devices in Fig. 1 in the state of peak excursion and utricule turnup,
Fig. 3 shows the length compensation device in Fig. 1 in the state of peak excursion and the non-turnup of utricule,
Fig. 4 shows length compensation device in the state of peak excursion and utricule turnup, with what is extended on periphery
Theoretical fold position,
Fig. 5 is shown with the length compensation device for being configured to corrugated utricule, and
Fig. 6 is shown with the length compensation device for being configured to corrugated utricule and pressure sensor.
In all the appended drawings, identical component is equipped with identical appended drawing reference.
Specific embodiment
Fig. 1 shows the stator 2 of eccentrie helical totorpump, and stator has the length compensation device 4 being connected on its end side.Stator
2 include elastomer 6, and elastomer is arranged within stator outer housing 8, wherein stator 2 on its herein unshowned end with pump case
Connection.
Elastomer 6 is fixed on the end of shell side, to activate length compensation device 4 when adjusting stator 2.The attached drawing
Shown in the schematic diagram of length compensation device 4 be not only able to achieve the movement of axial negative direction and be able to achieve axial positive direction and moved, this
It is indicated by the arrow shown.
Cylinder-piston-is to the two-piece type supporter 10,12 for being used as length compensation device 4, wherein piston 10 has on periphery
The recess 14 of upper extension, sealing element not shown here are arranged in recess.Positive direction during adjustment process is fixed when moving
Spacing between sub- flange 18 and syringe pump method orchid 20 increases, and elastomer is under pressure load simultaneously therefore shrinks.After this, it is applied to
Pressure on rotor (not shown) improves.In contrast, when negative direction moves, elastomer is extended and is applied on rotor
Pressure reduces.
The utricule 16 of elastomeric style is disposed within supporter 10,12, the utricule of elastomer is in stator side pressure seal
Ground be clamped between stator flange 18 and piston 10 and on the pressure side syringe pump method orchid 20 and cylinder 12 between.Piston 10 is faced at it
It is equipped with protrusion on the side of utricule 16 on end side respectively, it is as small as possible to be kept as the mechanical load of utricule 16.With
The fluid (not shown) that can be lubricated is filled in the fluid cavity 22 formed between utricule 16 and supporter 10,12.By in cylinder 12
Lower part valve port 24 fluid can be filled, wherein sky can be discharged during filling process by the opposite opening 26 in cylinder 12
Gas.It flows out in order not to have fluid from opening 26 and is able to achieve the desired supporting role to utricule 16, in filling process
Close to pressure seal opening 26 again later.
It sees in the axial direction, utricule 16 has different wall thickness, therefore the wall thickness on blue 18 sides of syringe pump method is less than fixed
Wall thickness on sub- side.It is thus achieved that utricule 16 is in the sufficiently large rigidity that should not be deformed or should only in the region of small deformation.That is,
The shape change realized when activating length compensation device 4 substantially only occurs in the region being arranged thus.
Length compensation device in the state of maximum positive direction and maximum negative direction offset is shown in figure 2 and figure 3
4.Utricule 16 shown in figure 2 has shown under turnup state due to its basic configuration and different material thickness
Shape.Fig. 3 shows utricule 16, and at it, no elasticity becomes within length compensation device in the state of the offset of maximum positive direction
In the basic configuration of shape.
The length compensation device 4 similar to Fig. 2 is shown in FIG. 4, only for the recessed of sealing element without shown in
Mouthful, which includes the utricule 16 of turnup, but utricule has theory pleated portions due to its special make
Position especially has the theoretical fold line 28 of closure, extends on the periphery of utricule 16.In this regard, utricule 16 is on periphery with more
A face section 30, multiple face sections to realize desired shape when compressing utricule 16.Face section 30 at least utricule 16 not
It is arranged angularly in relation to one another in the state of deformation, wherein form theoretical fold line 28 from the transition part of face to an adjacent surface.It is logical
Cross the fluid support utricule 16 (depicted with dots) in the fluid cavity 22 between utricule 16 and supporter 10,12.
Fig. 5 shows the utricule 16 that the basic configuration in profilograph is in corrugated configuration, utricule energy based on its shape
It is enough compressed and is stretched.Utricule 16 locally sticks on piston 10 and fluid cavity 22 forms the multiple chambers divided.For
Guarantee or improve the percolation between each chamber, can in cylinder-supporter 22, in the region of the contact site with utricule 16
In, the recess (not shown) longitudinally extended is introduced, recess forms flow channel and each chamber is made to be connected to each other.
Fig. 6 is shown with the length compensation device for being configured to corrugated utricule 16 as in Fig. 5, wherein stream
Body cavity 22 couples via the valve port on top with valve 34 and the pressure gauge being connected through 32.Valve 34 is used as shut-off valve and damping herein
Valve.Alternatively or to this addedly to this, fluid cavity 22 can join via the valve port on top and controllable pressure source (not shown)
It connects, to control pressure in fluid cavity 22 or to be regulated and controled by pressure sensor.
Device is preferably oriented according to adjustable stator of eccentrie helical totorpump.Due to use especially via fluid cavity by
The utricule that supporter is consolidated realizes following advantages, that is, the guiding piece for being for example configured to supporter will not connect with pumped (conveying) medium
Touching, guiding piece should be lubricated reliably to run.The infundibulate shape of utricule plays the flowing of pumped (conveying) medium and its fold performance
Advantageous effect.
Reference signs list
The stator of 2 eccentrie helical totorpumps
4 length compensation devices
6 elastomers
8 stator outer housings
10 piston as (internal) supporter
12 cylinder as (external) supporter
14 are used for the recess of sealing element
16 (elastomer) utricules
18 stator flanges
20 syringe pump methods are blue
22 fluid cavitys
24 valve ports
26 openings
28 theoretical fold lines
30 face sections
32 pressure gauges
34 valves
Claims (9)
1. length compensation device (4) is applied along the eccentrie helical totorpump for the stator (2) being adjusted axially with rotor and energy edge,
The length compensation device includes the supporter (10,12) that at least one can be axially moveable,
It is characterized in that, the utricule (16) for supporter distribution is arranged in the supporter (10,12) to guide conveying
Medium；
Wherein, the supporter couples with utricule pressure seal, to form the fluid cavity (22) of support utricule；
In order to regulate and control the fluid within fluid cavity (22), supporter (10,12) has at least one can closed opening (26)
And/or valve port (24)；And
Fluid Volume in fluid cavity (22) is to regulate and control.
2. the apparatus according to claim 1, which is characterized in that the utricule (16) is shaped to infundibulate.
3. the apparatus of claim 2, which is characterized in that be tapered towards pump to utricule (16) infundibulate.
4. device as claimed in any of claims 1 to 3, which is characterized in that the utricule (16) is arranged in conveying
Medium discharge side.
5. device as claimed in any of claims 1 to 3, which is characterized in that supporter (10,12) is configured to cylinder-
Piston-is right.
6. device according to claim 5, which is characterized in that the supporter (10,12) is configured to induction element.
7. device according to claim 5, which is characterized in that the supporter (10,12), which has, is used for sealing device
Recess (14).
8. device as claimed in any of claims 1 to 3, which is characterized in that the utricule (16) has theoretical pleat
It wrinkles position (28).
9. eccentrie helical totorpump, with length compensation device as claimed in any of claims 1 to 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014117932.3A DE102014117932B3 (en) | 2014-12-04 | 2014-12-04 | Length compensation device |
| DE102014117932.3 | 2014-12-04 | ||
| PCT/DE2015/000572 WO2016086911A1 (en) | 2014-12-04 | 2015-12-03 | Length compensation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107002668A CN107002668A (en) | 2017-08-01 |
| CN107002668B true CN107002668B (en) | 2019-02-15 |
Family
ID=55486094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580066076.7A Expired - Fee Related CN107002668B (en) | 2014-12-04 | 2015-12-03 | Length compensation device |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP3227555A1 (en) |
| JP (1) | JP2017536507A (en) |
| KR (1) | KR20170091687A (en) |
| CN (1) | CN107002668B (en) |
| AU (1) | AU2015357838B2 (en) |
| DE (1) | DE102014117932B3 (en) |
| RU (1) | RU2017123351A (en) |
| WO (1) | WO2016086911A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016121581B4 (en) | 2016-11-10 | 2018-07-26 | Seepex Gmbh | Cavity Pump |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1260314B (en) * | 1959-10-23 | 1968-02-01 | Fmc Corp | Eccentric screw pump with suction chamber on the drive side |
| DE1303705C2 (en) * | 1966-07-06 | 1973-10-11 | AXIAL DISPLACEMENT PUMP WITH ROTATING PUMP ELEMENT | |
| DE3000477A1 (en) * | 1980-01-08 | 1981-07-09 | Lorenz 7312 Kirchheim Baron | Universal shaft joint for pump - has two pivot pins turning in coupling head and shaft end at right angles |
| DD279043A1 (en) * | 1988-12-29 | 1990-05-23 | Hydrogeologie Nordhausen Halle | STATOR FOR ECCENTRIC SCISSORS |
| FR2660046B1 (en) * | 1990-03-26 | 1992-07-17 | Agard Jean Paul | EXPANSION COMPENSATOR FOR PIPES. |
| DE102005042559A1 (en) * | 2005-09-08 | 2007-03-15 | Netzsch-Mohnopumpen Gmbh | stator |
| FR2948424B1 (en) * | 2009-07-23 | 2017-07-21 | Pcm | PROGRESSIVE CAVITY PUMP AND ASSOCIATED PUMPING DEVICE |
| DE102010037440B4 (en) * | 2010-09-09 | 2014-11-27 | Seepex Gmbh | Cavity Pump |
| CN203783889U (en) * | 2014-03-04 | 2014-08-20 | 唐山玉联机电有限公司 | Adjustable liquid medium conveying screw pump |
| CN203939701U (en) * | 2014-03-12 | 2014-11-12 | 重庆美视水电设备制造厂 | One can compensate interior engagement rotary type screw pump assembly |
| CN104047846B (en) * | 2014-06-09 | 2018-05-15 | 无锡市恒烽水煤浆有限公司 | Wear-resistant high-pressure single-screw pump |
-
2014
- 2014-12-04 DE DE102014117932.3A patent/DE102014117932B3/en active Active
-
2015
- 2015-12-03 WO PCT/DE2015/000572 patent/WO2016086911A1/en active Application Filing
- 2015-12-03 EP EP15841038.1A patent/EP3227555A1/en not_active Withdrawn
- 2015-12-03 CN CN201580066076.7A patent/CN107002668B/en not_active Expired - Fee Related
- 2015-12-03 KR KR1020177017951A patent/KR20170091687A/en not_active Application Discontinuation
- 2015-12-03 AU AU2015357838A patent/AU2015357838B2/en not_active Ceased
- 2015-12-03 JP JP2017529770A patent/JP2017536507A/en active Pending
- 2015-12-03 RU RU2017123351A patent/RU2017123351A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU2015357838A1 (en) | 2017-07-06 |
| AU2015357838B2 (en) | 2018-12-06 |
| JP2017536507A (en) | 2017-12-07 |
| WO2016086911A1 (en) | 2016-06-09 |
| DE102014117932B3 (en) | 2016-03-31 |
| RU2017123351A (en) | 2019-01-09 |
| EP3227555A1 (en) | 2017-10-11 |
| KR20170091687A (en) | 2017-08-09 |
| CN107002668A (en) | 2017-08-01 |
| RU2017123351A3 (en) | 2019-01-09 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 Termination date: 20211203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |