CN1791750A - Eccentric screw pump - Google Patents
Eccentric screw pump Download PDFInfo
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- CN1791750A CN1791750A CN200480010646.2A CN200480010646A CN1791750A CN 1791750 A CN1791750 A CN 1791750A CN 200480010646 A CN200480010646 A CN 200480010646A CN 1791750 A CN1791750 A CN 1791750A
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- eccentrie helical
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to an eccentric screw pump (1) comprising a stator (2) and a rotor (3) between which the material, which is to be transported, is displaced when the rotor (3) is rotated in the stator (2) from an inlet area (4) on the suction side to a discharge area (5) on the pressure side. Said pump comprises a rotor head part (7) which closes the pressure-side discharge area (5) and which is fixed to the front (6) of the rotor (3), rotating therewith. Said rotor head part comprises at least one recess (8) which transverses the head part and which is disposed in the rotor head part (7) in relation to the rotor surface (6) which is to be maintained, such that the recess (8), which rotates at the same time as the rotor (3) in the direction of conveyance (10), opens up the pressure volume area (11, 11') and a recess-free rotor head part area (13) keeps the opposite-lying suction volume area (12, 12') sealed while the pressure volume area (12, 12') is opened.
Description
The present invention relates to a kind of eccentrie helical totorpump, it has a stator and a rotor, between stator and rotor, when rotor rotates in stator, material is transplanted on the pressure side a material discharge region by the feeding zone from an inspiration side, wherein, in material discharge region on the pressure side, an opposed pressure-volume district and inspiration-containment volume change along with rotor rotation between stator and rotor and change.
The known eccentrie helical totorpump of this class comprises a rotor that is configured to worm screw, and the form of rotor also comprises a stator as the round thread bar of a large screw pitch, deep thread, and stator has the internal structure of helical, and therefore the form of worm screw shell is arranged.Because the internal structure of this helical of stator constitutes a plurality of cavitys axial, that form successively from inspiration lateral pressure side, rotor just rotates in such cavity.During rotor rotation, the inner surface of stator part contacts with the outer surface part of rotor, just there have been conveying chamber and attached sealing area between the outer surface of inner surface of stator and rotor at this moment, when rotor rotated in the cavity of stator, the material in the conveying chamber was along carrying the highway section to deliver on the pressure side from the inspiration sidesway.
In document EP 0 713 974, learn a kind of like this eccentrie helical totorpump, this pump makes the abrasion material can carry out continuous conveying by the rotation of rotor in the cavity of stator.Wherein stator is made by elastic material and is adjacent to rotor by prestressing force, and the terminal of the conveying chamber that therefore is in operation forms a sealing all the time.The abrasion material that extrudes from discharge cavity on the pressure side is subjected to continuing the restriction of existing material in the pressure tube of directing material, is pressed on the material that promotes later with opposite external pressure.Therefore this course of conveying can be set up one especially with respect to the interior pressure of sealing area.
In order to ensure security seal, the external pressure of setting up in the pressure tube is higher, and the prestressing force between stator and the rotor just must be bigger.
A problem is arranged here, and promptly stator and rotor exist wear phenomenon, especially during conveying material.This wearing and tearing mainly appear at from material discharge region side on the pressure side along the pitch of the inspiration side feeding zone direction stator that sealing forms as cavity.And the increase of wearing and tearing causes the transmission power of eccentrie helical totorpump to reduce.
Flexible stator is adjacent to rotor by prestressing force, and therefore, the existence owing to material between stator and the rotor may produce high wearing and tearing, and these wearing and tearing are with the increase equivalent rising of pressure.Wearing and tearing are from the pressure side progressively moving and destroy original sealing area to the inspiration side.When interior pressure can not overcome external pressure, course of conveying finally takes place interrupt.
Therefore, material relies on the conveying of pressure to depend on the sealing condition of sealing area between stator and the rotor to a great extent in the conveying chamber.Problem for wearing and tearing interference in the sealing area between long operating time inner control rotor outer surface and stator inner surface, known that a kind of stator that adopts can tighten the eccentrie helical totorpump of form once more, adopt such pump, equipped the clamping panel that certain and stator form one, or can go into closed clamp device in pump other people frock.Adopt this clamp device, under the abrasion condition that can identify sealing area inside, fine or carry out the radial compression of stator integral body as required, whereby, make stator inner surface can be adjacent to rotor outer surface, cause in sealing area, forming original sealing simultaneously.
In document DE 33 04 751 C2, the eccentrie helical totorpump that has the stator that can not tighten has once more been described also, wherein, under the measure-alike situation of rotor radial, stator is shrunk to taper from inspiration lateral pressure side, or under the identical completely situation of stator dimensions, rotor has a kind of cumulative spiral cross section from inspiration lateral pressure side.
Problem is that in these two kinds of schemes and in the situation that keeps two kinds of stable schemes of sealing to combine, production and quality monitoring all need very high material, monitoring and personnel to drop into.
Know that in document DE 202 15 849.7 also having a kind of eccentrie helical totorpump, this pump is on the pressure side by the material discharge region check valve apparatus that allows the abrasion material to pass through to be arranged, and belongs to the lock washer that is rigidly fixed on the stator faces that also has of this device.Therefore rotor end-face then rotates on lock washer, can reach the variable pressure-volume district and the sealing of inspiration-containment volume.The lock washer that is fixed on the stator has two fixing through holes that are used for the material discharge, and two through holes are furnished with an one-way valve separately.These two through holes that valve is housed are assigned to by rotor material discharge region shared pressure-volume district and inspiration-containment volume, and open when the interior pressure in the volume area is greater than the external pressure that adjoins in the pressure tube that continues directing material in the valve place separately between stator and the rotor.
The problem here is, thisly is fixed on the lock washer on the stator and the design of valve, needs additional structural elements.At least must wash-out valve after eccentrie helical totorpump uses.
The objective of the invention is to, propose a kind of eccentrie helical totorpump, it designs to such an extent that install simple and easy in material discharge region and is convenient to maintenance.In the sealing area of stator and rotor, the wearing and tearing in the pressure span of discharge cavity especially on the pressure side should obviously slow down or reduce greatly simultaneously.Also should make very short stator and rotor and carry the length in highway section further to shorten, and transmission power originally still can be kept to a great extent through after the long period.
Above-mentioned purpose realizes by the feature of claim 1.In this eccentrie helical totorpump that the preamble of claim 1 is stipulated, the material discharge region of a confining pressure side is set, the rotor head that is fixed on the end face of rotor and together rotates with rotor, described rotor head has at least one space that connects head, described space is arranged in such a way in the rotor head with the rotor end-face of fixing explicitly, make and open the pressure-volume district concomitantly, and a void-free rotor head part is opened the relative inspiration of duration chien shih-containment volume maintenance hermetically closing in the pressure-volume district with rotor consistent rotating space on throughput direction.
Rotor head connects, welds by bolt with the rotor head back side or similar mode is fixed on the rotor end-face.
Rotor head can be fixed on the rotor end-face by this way, makes the central axis of rotor head to coincide with the center of rotor end-face.In this case, the motion of central axis is a concentric straight-line extension, can move out of the curvilinear path of an off-centre under situation about misfitting.
Directly the end near rotor is arranged in the rotor head in the side in the space of described perforation, wherein, is adapted to because the pressure of rotor rotation in the pressure-volume district forms and the discharge of material the size of free cross-section be stipulated.
Rotor head can preferably a kind ofly have the rotor porose disc of rounded face.The space of affiliated perforation can preferably be the slotted hole of beans shape substantially in the sectional view of overlooking.
Rotor head is installed on the rotor end-face like this, make the edge of the supporting rotor end face of hole from radially, be adapted to the pressure of rotor in the pressure-volume district with its effective opening section and produce ground, enter into the pressure-volume district with the sintering, hole, from the pressure-volume district, come out again with the termination environment, hole afterwards.
The space of the perforation of rotor head also can be made one selectively from the through hole of the covering of the fan edge, radial directed the cross section shape of securing rotor end-face or fan-shaped opening, they are as the slotted hole structure, be adapted to the pressure of rotor in the pressure-volume district with their effective opening sections and produce ground, enter the pressure-volume district, after skimming over the pressure-volume district, come out from the pressure-volume district again.
In order to make pressure be reduced to sealing area in the stator, rotor head has such circumferential size, and the inspiration-containment volume that forms in the stator openings zone when making rotor head make each the rotation with its remaining void-free part keeps sealing.
Rotor configuration becomes a worm screw with round thread shape of the large screw pitch and the major thread degree of depth, and stator is a worm screw shell, it comprises cavity-at least one the inspiration side charging cavity that axially constitutes successively of carrying the highway section and one discharge cavity on the pressure side, between stator inner surface and rotor outer surface, owing to the sealing area that mates between stator and the rotor has formed conveying chamber, when rotating in the cavity of rotor at stator, the material in the conveying chamber can move on the pressure side material discharge region by inspiration side feeding zone.
Can fix a pressure tube that continues conveying material on stator faces, pressure tube can be fixed on the stator hermetically by at least one supporting element that surrounds stator and pressure tube.
The invention enables: owing to the existence of material discharge region rotor head or rotor porose disc on the pressure side, originally relevant with pressure tube pressure chamber is able to separate from the original cavity of discharge on the pressure side relevant with pump after pump discharge.By after opening along with rotor rotation by the space that connects at every turn, the rotation by rotor obtains follow-up material from inspiration side feeding zone and fills at material discharge region on the pressure side.
Improvement structure and other design are illustrated in other dependent claims.
By an embodiment, at length explain the present invention with reference to accompanying drawing.Accompanying drawing is represented:
The perspective diagram that splits of the relevant eccentrie helical totorpump of the present invention of Fig. 1 has rotor head that is unloaded by rotor end-face and the attachable pressure tube that is unloaded by stator faces,
End face-the schematic top plan view of the rotor porose disc in a hole of Fig. 2 band, the material position when the pressure-volume district begins to discharge, the rotor-angle [alpha] of regulation=0 °,
End face-the schematic top plan view of the rotor porose disc that Fig. 3 is with holes, material be the position during maximum the discharge from the pressure-volume district, and rotor rotates rotor-angle [alpha]=90 ° according to Fig. 2,
End face-the schematic top plan view of the rotor porose disc that Fig. 4 is with holes, material is discharged the position after finishing from up to the present pressure-volume district, or the position of material when new formation, relative pressure-volume district begins to discharge, rotor rotates rotor-angle [alpha]=180 ° according to Fig. 2
The longitudinal sectional drawing of the eccentrie helical totorpump that Fig. 5 shortens, band rotor porose disc is pressed Fig. 3 along the I-I vertical line.
In the schematic representation that Fig. 1 splits, shown a kind of eccentrie helical totorpump 1, it has a stator 2 and a rotor 3, when rotor 3 rotates in stator 2, material is transplanted on the pressure side material discharge region 5 by the feeding zone 4 from the inspiration side between them, simultaneously, forming between stator 2 and rotor 3 with the rotor rotation in material discharge region 5 is condition and volume changes and a pressure-volume district 11 and an inspiration-containment volume 12 of conversion.
According to the present invention, be provided with on the end face 6 a kind of closing pressure side material discharge region 5, that be fixed on rotor 3 and with rotor 3 rotor rotated head 7 together, this rotor head has a space 8 that connects head at least, this space is arranged on the rotor head 7 with the rotor end-face of fixing 6 explicitly by this way, make and follow pressure-volume district 11 to open together, and the relative inspiration-containment volume 12 of the duration chien shih of opening in pressure-volume district 11 keeps hermetically closing with rotor 3 consistent rotating space 8 in throughput direction 10.
Under the situation at the dish of circle positive 9 and the circular dish back side 30, rotor porose disc 7 can be fixed on its dish back side 30 on the rotor end-face 6 like this, make the central axis 33 of rotor porose disc 7 preferably can coincide 33 straight-line extensions of central axis with the center 28 of rotor end-face 6.If but the central axis 33 of rotor porose disc 7 leaves the center 28 of rotor end-face 6, operation just is not the extension of concentric straight line so, but the curvilinear path of an off-centre.
Positive 9 and also can to constitute oval-shaped, cross section with regard to its periphery be pyriform or avette or the like at the back side 30, especially can select to reduce the shape of materials consumption.Enumerated the second kind of rotor head 27 (part that dotted line is drawn) that reduces materials consumption among Fig. 2.
Importantly space 8 should be designed like this, makes inspiration-containment volume 12, and 12 ' remains hermetically closing during rotor rotation, and pressure-volume district 11,11 ' opens adaptably with rotor.
As also illustrating among Fig. 2 to 4, slotted hole 8 direct edges from the side set out and extend, enter rotor porose discs 7 on end face 6 sides of rotor 3 along radial direction, simultaneously, form with pressure in the pressure-volume district 11 and with 11 discharge materials adaptably by rotor rotation from the pressure-volume district, the hole sectional dimension of overlooking is stipulated.
Allow the rotor head 7 of material by space 8 to be arranged in to be equivalent to approximately " half " middle cavity 16, to material discharge region 5 at the similar discharge cavity 17 on the pressure side of shown first conveying chamber of Fig. 1 20, in order in Fig. 1, to explain better, rotor porose disc 7 is separated from rotor end-face 6 in the schematic representation that splits, and according to the present invention, it abuts against on the stator faces 25 on being fixed in rotor end-face 6 time.
The rotor head back side 30 and stator faces 25 all are plane structures, and have an about angle of 90 ° separately with respect to pump central axis 26.
Rotor head front 9 can be the plane when disc structure, also ball collar shape and/or be equipped with the profile that pass through to reach mixed performance that is used to improve material that at least one has the wing or other projection.
The material discharge region on the pressure side 5 of eccentrie helical totorpump 1 comprises last, the part of discharging material of eccentrie helical totorpump 1, and the feeding zone 4 of inspiration side be eccentrie helical totorpump 1 at first, receive the part of material.
Therefore, the invention enables, from eccentrie helical totorpump 1 discharge material that side pressure goes out pressure-volume district 5 with the rotor rotation be condition open and 12 sealings of inspiration-containment volume after, no longer the integrated disc portions 13 by atresia flows backwards, and can not press to by rotor 3 and promote or the material of suction.
Therefore, in that rotor 3 is each when rotating, taking place in stator 2 and rotor 3 zones at least for the second time, also is the off-load of last sealing area 24, causes the wearing and tearing reduction thus.
As shown in fig. 1, can fix a pressure tube 34 towards rotor head front 9 on stator faces 25, material continues to carry by pressure tube 34.
Pressure tube 34 can be fixed on the stator 2 hermetically by at least one supporting element (not shown) that especially surrounds stator and pressure tube.
In Fig. 2, rotor 3 is in inspiration-containment volume 12 with angle and pivotal position 28 with the rotor end-face 6 of its circle, has stipulated that rotor angle for example when this position: α=0 °.Rotor porose disc 7 is installed on the rotor end-face 6 like this, makes the slotted hole 8 of beans shape with sintering, hole 35 beginning of its very little part with respect to its effective vent cross section, overburden pressure-containment volume 11.With in the pressure-volume district 11 because rotor 3 rotates and produces pressure and adapt, the slotted hole effective cross section size that is used for the covering opening in pressure-volume district 11 becomes big too.The integrated disc portions 13 of remaining and no slotted hole can be come the remainder of closing pressure-containment volume 11 according to the size of slotted hole 8, and hermetically closing inspiration-containment volume 12.The position of Fig. 2 rotor porose disc 7 relative rotors 3 is close to consistent with the position of Fig. 1 rotor porose disc 7 relative stator 2.
Among Fig. 3, rotor 3 ° forwards central position 28 ' to angle [alpha]=90, this moment beans shapes slotted hole 8, comprise sintering, hole 35 and termination environment, hole 36, therefore covered the overwhelming majority in pressure-volume district 11 and opened this part with complete hole cross section, and the integrated disc portions 13 of atresia also all the time hermetically closing inspiration-containment volume 12.
In Fig. 4 because rotor 3 has been rotated further the angle of α=90 °, just rotated 180 ° altogether, material from the pressure-volume district 11 processes of discharging in the central position 28 " finish.Come out from the pressure-volume district 11 of decompression with its termination environment, hole 36 in hole 8.Original inspiration-containment volume 12 is by means of the integrated disc portions 13 of atresia hermetically closing still also, but because rotor rotation, as the pressure-volume district among Fig. 2 11 ' and rotor rotation begin adaptably to open.Hole 8 enters the relative pressure-volume district 11 ' that sets up with its sintering, hole 35.
In Fig. 4, also demonstrate, can be as the hole 8 in the space that connects with another form formation from opening 32 supporting rotor end face 6s, that become sector shape radially or sector notch 31, opening and breach with dashed lines are respectively drawn.
At Fig. 2,3, the rotor porose disc 7 that is used for pressure being reduced at least the sealing area 24 within the eccentrie helical totorpump 1 of overlooking demonstration with end face in 4 has such circumferential size, makes stator openings 27 remain inspiration-containment volume 12 hermetically closings that produced at that time when rotor porose disc 7 rotates.
In Fig. 5, eccentrie helical totorpump 1 has been described according to the longitudinal section signal of the shortening of Fig. 3 cathetus I-I.The size of rotor porose disc 7 is definite so at this moment, and it is remained on when rotor rotation in its range of movement, preferably remains in the stator casing 29, that is to say, does not surmount stator casing.Rotor porose disc 7 is fixedlyed connected with rotor end-face 6 with its dish back side 30.The dish back side 30 will constitute the plane like this no bore portion 13 in, it can tightly be leaned against on the stator faces 25 on plane equally preferably, and angle that is approximately 90 ° of central axis 26 formation of relative pump.The passage that material leads to back pressure tube 26 is opened for pressure-volume district 11 in hole 8.The integrated disc portions 13 of atresia the closing of side discharge cavity 17 inspirations-containment volume 12 that keep-up pressure.
In Fig. 5,, in the shortest structure of stator 2, can only constitute a sealing area 24 of a pitch worm, and on the pressure side material discharge region 5 can directly connect inspiration side feeding zone 4 according to the present invention.The positional stability of rotor 3 in pitch worm provided by the rotor head 7 that leans against on the stator faces 25.
The action principle of eccentrie helical totorpump 1 of the present invention is as follows:
The rotor 3 (worm screw) of metal is the conveying chamber 20,21,22 on rotation and the sealed stator internal surface 18 in the stator 2 (worm screw shell) that elastic material constitutes.By the rotation of rotor 3, conveying chamber 20,21, the material in 22 is transported on the pressure side material discharge region 5 by the feeding zone 4 of inspiration side.Produce a lasting material flow thus in the stator 2, the material flow pulsed leaves the hole 8 of rotor head 7.
If material flow is pushed into discharge cavity 17 on the pressure side, especially pass through conveying chamber 22, so, the material within the containment volume 11 of dwindling is extruded the hole 8 of locating at that time by owing to rotor rotation in pressure-volume district 11, and inspiration-containment volume 12 keeps closing.
In order to finish the discharge process by being rotated further of rotor, rotor end-face 6 in-positions 28 "; in this position, the pressure-volume district 11 that dwindles is transformed into the pressure-volume district 11 ' that has been filled material fully, and up to the present this containment volume is inspiration-containment volume 12.Turn over the corner of α=180 ° by rotor, produce pressure in formed pressure-volume district 11 ', this pressure is complied with rotor with material and is extruded from hole 8.Up to the present pressure-volume district 11 changes the inspiration-containment volume 12 ' of new formation over to rotor rotation.So far opened afterwards pressure-volume district 11 is closed and rebuilds inspiration-containment volume 12 ' by the integrated disc portions 13 of atresia.Therefore can not form back-pressure to existing material in the conveying chamber 21 subsequently, nor can make sealing area 24,23, particularly on the pressure side last sealing area 24 back-pressures of discharge cavity 17 load increases the weight of.On the contrary, by the inspiration-containment volume 12 ' that increases, strong suction be applied in subsequently from the material in the conveying chamber 21.
Be transformed on the pressure side radially relative containment volume 11 in the discharge cavity 17 at that time with rotor 3,12 or 12 ', 11 ' two extreme positions 28,28 " be condition; by means of rotor porose disc 7 of the present invention, in discharge cavity 17, produce the conversion of taking out and inhaling process of material, wherein; by with the inspiration of material to the containment volume 12 or 12 ' that disk seal separately closes, reached a higher material degree of filling there.
The present invention can make and carry highway section 14 to shorten, and can relate to the structural arrangements 15-16-17 of two " cavity lengths " or a kind of " charging cavity-cavity-discharge cavity ".Can select to carry highway section 14 to shorten to a pitch worm of stator 2.
By rotor head of the present invention is installed, especially on eccentric screw pump rotor afterbody up to now, add rotor porose disc 7 and the have relative long stator and the eccentrie helical totorpump of having produced of rotor carried out useful shortening as much as possible, even if use the lower motor of power, also can reach needed transmission power, thus can also conserve energy and material.
Increasing of discharge pressure realizes by prestressed increase between stator 2 and the rotor 3 that in principle this problem generally is the mode with axial plane traditionally, for example solves by a clamping shell that surrounds stator 2.
The problem here is, does the energy consumption of the corresponding increase pump drive of meeting like this.
In order to make eccentrie helical totorpump 1 of the present invention increase under the discharge pressure situation and can also effectively turn round forcefully, stipulate:, correspondingly improve prestressing force with small as far as possible axial finishing radially with respect to central axis 26 orientations.
For this reason, can in the zone of stator 2,, radial cross section be dwindled from the rotor end-face 6s to be equivalent to an integer spacing of a worm screw outer casing screw that changes.
If have the rotor 2 of an above worm screw outer casing screw, can be that stator 2 is provided with a reduced cross-sectional element (not shown) radially from the zone of rotor end-face 6s with the spacing of about one a worm screw outer casing screw that is equivalent to stator 2.
This reduced cross-sectional element radially can be in stator casing 29 and/or outside, be constructed and arranged to an element system in the ring set mode, this element system can be controlled selectively or is adjusted in radial direction by actuator can be changed, and utilize this element system to regulate the radially prestressing force of stator 2 step by step or continuously according to discharge pressure given in advance with respect to the sealing area 23,24 of rotor 3.
The present invention has disclosed a kind of like this possibility, promptly, except delaying wearing and tearing formation in time, compare with known can tightening again, can also reduce manufacture cost with the eccentrie helical totorpump that can not tighten again and the known labyrinth of establishing check valve apparatus in eccentrie helical totorpump stator terminal location.
The Reference numeral table
1 eccentrie helical totorpump
2 stators
3 rotors
The feed zone of 4 inspiration sides
5 on the pressure side material discharge regions
6 rotor end-faces
7 first rotor heads
8 spaces that connect
9 rotor head fronts
10 rotational conveyance directions
11 first pressure-volume districts
11 ' second pressure-volume district
12 first inspiration-containment volume
12 ' second inspiration-containment volume
The rotor head part of 13 no slotted holes
14 carry the highway section
The charging cavity of 15 inspiration sides
Defeated material cavity in the middle of 16
17 on the pressure side discharge cavitys
18 stator inner surfaces
19 rotor outer surfaces
20 first conveying chambers
21 second conveying chambers
22 the 3rd conveying chambers
23 first sealing areas
24 second sealing areas
25 stator faces
The central axis of 26 pumps
27 stator openings
Rotor end-face center during 28 α=0 °
Rotor end-face center during 28 ' α=90 °
28 " rotor end-face center during α=180 °
29 stator casings
The 30 rotor head back sides
31 fan-shaped breach
The opening of 32 sector shapes
33 rotor head central axis
34 pressure tubes
Sintering, 35 hole
Termination environment, 36 hole
37 second rotor heads
Claims (18)
1. eccentrie helical totorpump (1), it has a stator (2) and a rotor (3), between stator and rotor, when rotor (3) rotates in stator (2), material is transplanted on the pressure side a material discharge region (5) by the feeding zone (4) from an inspiration side, wherein, in material discharge region (5) on the pressure side, an opposed pressure-volume district (11) and an inspiration-containment volume (12) change along with rotor rotation between stator (2) and rotor (3) and change, it is characterized in that, the material discharge region (5) of a confining pressure side is set, the rotor head (7) that the end face (6) that is fixed on rotor (3) is gone up and together rotated with rotor (3), described rotor head has at least one space (8) that connects head, described space is arranged in such a way in the rotor head (7) explicitly with the rotor end-face of fixing (6), make that going up consistent rotating space (8) with rotor (3) at throughput direction (10) opens pressure-volume district (11 concomitantly, 11 '), and a void-free rotor head part (13) is in pressure-volume district (11,11 ') open the relative inspiration-containment volume of duration chien shih (12,12 ') and keep hermetically closing.
2. according to the eccentrie helical totorpump of claim 1, it is characterized in that rotor head (7) has such circumferential size, that is, rotor head (7) is opened pressure-volume district (11,11 ') when rotating, and the inspiration-containment volume (12,12 ') that remains in stator openings (27) zone is closed.
3. according to the eccentrie helical totorpump of claim 1 and/or 2, it is characterized in that, rotor head (7) is fixed on the rotor end-face (6) with the rotor head back side (30) by bolt, welding or similar mode, wherein, the remaining rotor head back side (30) and stator faces (25) are the planes, and form about 90 a ° angle with the central axis (26) of pump.
4. according at least one eccentrie helical totorpump of aforesaid right requirement, it is characterized in that, the space of described perforation (8) preferably directly is set in the rotor head (7) near rotor (3) end face in the side (6), and, the size adaptation of free cross-section is in discharging material by rotor rotation in from pressure-volume district (11,11 ').
5. according at least one eccentrie helical totorpump of aforesaid right requirement, it is characterized in that, the space (8) of the perforation of rotor head (7) can select to be configured to one preferably from the pass through openings (32) of the sector shape edge, radial directed of fixing rotor end-face (6) or fan-shaped breach (31), it always is adapted to rotor in pressure-volume district (11 with its effective opening section, 11 ') pressure in enters pressure-volume district (11 with producing, 11 '), skimming over pressure-volume district (11,11 ') come out from pressure-volume district (11,11 ') again after.
6. according at least one eccentrie helical totorpump of aforesaid right requirement, it is characterized in that rotor head (7) is a rotor porose disc preferably, and the space of described perforation (8) are preferably a kind of slotted hole that is beans shape in overlooking the cross section substantially.
7. according to the eccentrie helical totorpump of claim 6, it is characterized in that rotor porose disc (7) is fixed on the rotor end-face (6) like this, make the central axis (33) of rotor porose disc (7) can select to coincide with the mid point (28) of rotor end-face (6).
8. according at least one eccentrie helical totorpump of aforesaid right requirement, it is characterized in that, rotor porose disc (7) is installed on the rotor end-face (6) like this, make hole (8) be adapted to rotor in pressure-volume district (11 with its effective opening section, 11 ') pressure in enters pressure-volume district (11,11 ') with sintering, hole (35) with producing, is skimming over pressure-volume district (11,11 ') come out from pressure-volume district (11,11 ') with termination environment, hole (36) again after.
9. according at least one eccentrie helical totorpump of aforesaid right requirement, it is characterized in that the rotor head back side (30) constitute with stator faces (25) plane earth and become about 90 a ° angle with pump central axis (26) respectively.
10. according at least one eccentrie helical totorpump of aforesaid right requirement, it is characterized in that, deviate from the rotor head front (9) of rotor end-face (6) and can select to be the plane, that be ball collar shape and/or to be equipped with the profile that passes through to reach mixed performance that is used to improve material that at least one has the wing or other projection for disc-shaped structure.
11. at least one eccentrie helical totorpump according to the aforesaid right requirement, it is characterized in that, rotor (3) is configured to a worm screw with round thread form of the large screw pitch and the major thread degree of depth, and stator (2) is a worm screw shell, it comprises each cavity (15 that axially constitutes successively of carrying highway section (14), 16,17)-charging cavity (15) and a discharge cavity (17) on the pressure side of at least one inspiration side, wherein, between stator inner surface (18) and rotor outer surface (19), because the sealing area (23) of coupling between stator (2) and the rotor (3), 24) form conveying chamber (20,21,22), when the cavity (15 of rotor (3) at stator (2), when rotating 16,17), conveying chamber (20,21,22) material in can be by feeding zone (4) the migration material discharge region (5) on the pressure side of inspiration side.
12. at least one eccentrie helical totorpump according to the aforesaid right requirement, it is characterized in that, on stator faces (25), can fix a pressure tube (26), continue conveying material by this pressure tube, wherein, described pressure tube (26) can be fixed on the stator (2) hermetically by at least one supporting element that especially surrounds stator and pressure tube.
13. at least one eccentrie helical totorpump according to the aforesaid right requirement, it is characterized in that, can be chosen in the zone of pressure tube (26) and a hold down gag is set on the end face (25) of stator (2) for rotor head (7), in order to strengthen the sealing of the inspiration-containment volume (12,12 ') between rotor (3) and the stator (2).
14. at least one eccentrie helical totorpump according to the aforesaid right requirement is characterized in that, carries highway section (14) preferably to relate to the structural arrangements (15-16-17) of two cavity lengths or a kind of " charging cavity-cavity-discharge cavity ".
15. at least one eccentrie helical totorpump according to the aforesaid right requirement is characterized in that, carries highway section (14) to shorten to a pitch worm of stator (2), wherein rotor head (7) especially helps the position stability of rotor (3).
16. at least one eccentrie helical totorpump according to the aforesaid right requirement is characterized in that, in the zone of stator (2), to be equivalent to a preferred integer spacing of a worm screw outer casing screw that changes, (6)s can be selected radial cross section is dwindled from rotor end-face.
17. eccentrie helical totorpump according to claim 16, it is characterized in that, under rotor (2) has situation more than a worm screw outer casing screw, with about one spacing that is equivalent to a worm screw outer casing screw of rotor (2), (zone of 6)s is that stator (2) sets a reduced cross-sectional element radially from rotor end-face.
18. eccentrie helical totorpump according to claim 17, it is characterized in that, described reduced cross-sectional element radially in stator casing (29) and/or outside be constructed and arranged to an element system in the ring set mode, this element system can be selected to be controlled and maybe can be adjusted in radial direction by actuator and can change, and, utilize this element system to regulate the radially prestressing force of stator (2) step by step or continuously according to discharge pressure given in advance with respect to the sealing area (23,24) of rotor (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20304292.1 | 2003-03-12 | ||
| DE20304292U DE20304292U1 (en) | 2003-03-12 | 2003-03-12 | Cavity Pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1791750A true CN1791750A (en) | 2006-06-21 |
| CN100429402C CN100429402C (en) | 2008-10-29 |
Family
ID=7980896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800106462A Expired - Fee Related CN100429402C (en) | 2003-03-12 | 2004-03-11 | Eccentric screw pump |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1601875B1 (en) |
| CN (1) | CN100429402C (en) |
| AT (1) | ATE332443T1 (en) |
| DE (3) | DE20304292U1 (en) |
| ES (1) | ES2268641T3 (en) |
| WO (1) | WO2004081385A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105121853A (en) * | 2013-03-07 | 2015-12-02 | 威乐欧洲股份公司 | Eccentric screw pump with overpressure protection |
| CN106685152A (en) * | 2015-11-10 | 2017-05-17 | 耐驰（兰州）泵业有限公司 | Manufacturing method for stator used for eccentric worm pump and capable of adjusting hydraulic pressure |
| CN108000836A (en) * | 2017-12-11 | 2018-05-08 | 华南理工大学 | The melt conveying flow equilibrium compensation method of eccentric rotor extruder and stabilising arrangement |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405631B (en) * | 2014-09-30 | 2016-06-01 | 余雷 | A kind of can the pump head of deep water intake |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HU175810B (en) * | 1977-12-28 | 1980-10-28 | Orszagos Koolaj Gazipari | Axial-flow multiple-purpose flow apparatus |
| DE3641855A1 (en) * | 1986-12-08 | 1988-06-16 | Allweiler Ag Werk Bottrop | Adjustable stator for eccentric screw pumps |
| US4802827A (en) * | 1986-12-24 | 1989-02-07 | Kabushiki Kaisha Toshiba | Compressor |
| JP2897844B2 (en) * | 1990-10-26 | 1999-05-31 | 兵神装備株式会社 | Single shaft eccentric screw pump |
| CN2100511U (en) * | 1991-04-16 | 1992-04-01 | 王时正 | Internal engagement epicycloidal oil pump |
| DE20215849U1 (en) * | 2002-10-10 | 2003-01-09 | Löffler, Norbert, Dr., 01734 Rabenau | Helical pump has stator and rotor discharging via back-flow prevention valve |
-
2003
- 2003-03-12 DE DE20304292U patent/DE20304292U1/en not_active Expired - Lifetime
-
2004
- 2004-03-11 CN CNB2004800106462A patent/CN100429402C/en not_active Expired - Fee Related
- 2004-03-11 ES ES04719362T patent/ES2268641T3/en not_active Expired - Lifetime
- 2004-03-11 WO PCT/DE2004/000538 patent/WO2004081385A1/en active IP Right Grant
- 2004-03-11 DE DE112004000856T patent/DE112004000856D2/en not_active Expired - Fee Related
- 2004-03-11 AT AT04719362T patent/ATE332443T1/en not_active IP Right Cessation
- 2004-03-11 DE DE502004000924T patent/DE502004000924D1/en not_active Expired - Lifetime
- 2004-03-11 EP EP04719362A patent/EP1601875B1/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105121853A (en) * | 2013-03-07 | 2015-12-02 | 威乐欧洲股份公司 | Eccentric screw pump with overpressure protection |
| CN105121853B (en) * | 2013-03-07 | 2016-11-30 | 威乐欧洲股份公司 | There is the eccentrie helical totorpump of overvoltage protection |
| US9920758B2 (en) | 2013-03-07 | 2018-03-20 | Wilo Se | Eccentric screw pump with overpressure protection |
| CN106685152A (en) * | 2015-11-10 | 2017-05-17 | 耐驰（兰州）泵业有限公司 | Manufacturing method for stator used for eccentric worm pump and capable of adjusting hydraulic pressure |
| CN106685152B (en) * | 2015-11-10 | 2019-03-12 | 耐驰（兰州）泵业有限公司 | Manufacture for eccentrie helical totorpump can hydraulic adjustment stator method |
| CN108000836A (en) * | 2017-12-11 | 2018-05-08 | 华南理工大学 | The melt conveying flow equilibrium compensation method of eccentric rotor extruder and stabilising arrangement |
| CN108000836B (en) * | 2017-12-11 | 2023-08-29 | 华南理工大学 | Melt conveying flow balance compensation method and stabilizing device of eccentric rotor extruder |
Also Published As
| Publication number | Publication date |
|---|---|
| DE502004000924D1 (en) | 2006-08-17 |
| EP1601875B1 (en) | 2006-07-05 |
| EP1601875A1 (en) | 2005-12-07 |
| ATE332443T1 (en) | 2006-07-15 |
| WO2004081385A1 (en) | 2004-09-23 |
| DE20304292U1 (en) | 2003-05-15 |
| ES2268641T3 (en) | 2007-03-16 |
| DE112004000856D2 (en) | 2006-02-02 |
| CN100429402C (en) | 2008-10-29 |
| WO2004081385A8 (en) | 2006-02-16 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20081029 Termination date: 20120311 |