CN101473139A - Moineau pump - Google Patents

Moineau pump Download PDF

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Publication number
CN101473139A
CN101473139A CNA2007800230444A CN200780023044A CN101473139A CN 101473139 A CN101473139 A CN 101473139A CN A2007800230444 A CNA2007800230444 A CN A2007800230444A CN 200780023044 A CN200780023044 A CN 200780023044A CN 101473139 A CN101473139 A CN 101473139A
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CN
China
Prior art keywords
internals
external member
pump
spin axis
screw pump
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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.)
Granted
Application number
CNA2007800230444A
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Chinese (zh)
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CN101473139B (en
Inventor
埃斯本·格伦堡·布伦
黑尔格·格兰
艾伊尔·达尔高·安徒生
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Emitec Denmark AS
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Grundfos Nonox AS
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Publication of CN101473139A publication Critical patent/CN101473139A/en
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Publication of CN101473139B publication Critical patent/CN101473139B/en
Expired - Fee Related legal-status Critical Current
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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
    • 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
    • F04C2/1076—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 orbits or wobbles relative to the other member which rotates around a fixed axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Saccharide Compounds (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a Moineau pump having an outer helical pumping element (4, 4') and an inner helical pumping element (2, 2') arranged in inside the outer element (4, 4'), wherein the inside of the outer element (4, 4') and the inner element (2, 2') are of conical shape, and wherein the inner element (2, 2') is rotatable about its longitudinal axis (X1) forming a first fixed rotation axis (X1) and the outer element (4, 4') is rotatable about its longitudinal axis (X2) forming a second fixed rotation axis (X2), wherein the first rotation axis (X1) and the second rotation axis (X2) are inclined to one another and the inner element (2, 2') is driven by the outer element (4, 4') or the outer element (4, 4') is driven by the inner element (2, 2').

Description

Screw pump
Technical field
The present invention relates to a kind of screw pump (Moineau pump), i.e. progressive cavity pump (progressingcavity pump).
Background technique
Known this class screw pump or progressive cavity pump from U. S. Patent 1,892,217 for example.This class pump is made up of with the internals in the cavity that is arranged on this annular external member the external member of annular.The inside of cavity and the outside of internals all have spiral-shaped.This internals rotates along eccentric track in the inside of this external member.In addition, the helix structure of this external member is Duoed a screw thread than the helix structure of this internals.
The problem of this class screw pump is that the motion of rotor of stator interior is complicated.In addition, because the friction that is produced under the situation of the friction and wear that does not increase member, is difficult to the pump chamber wiper seal under high pressure between maintenance stator and the rotor.
Summary of the invention.
In view of this, the purpose of this invention is to provide a kind of improved screw pump, this screw pump makes the motion complexity of internals and external member reduce and reduce simultaneously the wearing and tearing of member.
Achieve the above object by screw pump with the feature that in claim 1, limits.Dependent claims, hereinafter the explanation and as attached accompanying drawing in define a plurality of preferred embodiments.
Screw pump according to the present invention comprises the spiral pump external member and is arranged on the spiral pump internals of this pumping external member inside.According to this design, external member has the annular of cavity for inside.Internals is arranged in this cavity.The surface of the cavity of external member has spiral-shaped, and the outer surface of internals also has spiral-shaped.Outer surface by internals and these two apparent surfaces of internal surface of external member this spiral-shaped and between the internal surface of the outer surface of internals and external member, form pump chamber or cavity.
In addition, according to the present invention, the inside of this external member and this internals are taper.This means that this internals has longitudinally from an end to the cumulative diameter of the opposite the other end.The cavity of external member has longitudinally from an end accordingly to the cumulative shape of opposite the other end diameter.According to the present invention, internals and external member all are rotatable.Two members are all being provided with around the mode of its longitudinal axis rotation.The longitudinal axis of internals forms first spin axis, and internals can be around this first spin axis rotation.The longitudinal axis of external member forms second spin axis, and external member can be around this second spin axis rotation.Two spin axiss (i.e. first spin axis and second spin axis) are not parallel to each other, but incline towards each other.This means that two axes intersect are in an intersection point.Internals and external member are driven by the mode that external driver device directly drives with the only member in these two members.Another member is driven indirectly by another member that is connected with this external driver device.This means that according to the present invention, perhaps internals is driven by external member, perhaps external member is driven by internals.
This design can be simplified the motion of two members (being internals and external member).Two spin axiss are fixing axis.Need in the live axle that drives rotor, flexible joint or universal joint be set, and because the cause of the eccentric motion between internals and the external member, being arranged in traditional screw pump of above-mentioned joint is necessary.According to the present invention, two members all rotate, thereby two members all carry out eccentric motion relative to each other, but each member can be around a fixing spin axis rotation (described spin axis itself does not allow to move).
Increase from the throw of eccentric of the end to end of pump is linear because the spin axis that tilts makes, therefore can obtain the constant flow rate of pump.
In addition, fixing spin axis makes internals and external member to assemble better, and this reduces friction and wear.
At least a portion of described internals and/or described external member is preferably by at least a rigid material and makes.One of internals and external member use rigidity or hard material, are preferably internals and external member and all use rigidity or hard material, and the advantage that it had is to reduce wearing and tearing and make that the assembling of two members is more accurate.In addition, reliability that can obtain to strengthen and serviceability.Especially, this type of rigid material is used on the surface that allows internals and external member to contact with each other of the simplification campaign between internals and the external member.Because this better assembling can be in the wiper seal contact that realizes under the situation of not using elastic material between internals and the external member.Whole internals and/or external member are made by rigid material.In addition, these members also can only partly be made by rigid material, especially can apply the coating of rigid material on the surface that internals and/or external member contact with each other.In addition, internals and/or external member can be made by a kind of rigid material at least in part.Perhaps, for example can use several rigid materials as composite material.In addition, the different piece of described member can be made by different materials, so that these parts are suitable for especially considering the multiple requirement of friction and wear fully.
Especially, internals and/or external member are preferably made by stupalith.Stupalith is stone and wear and tear minimumly, makes pumping element (being internals and external member) have high serviceability.
In addition, preferably, described internals or described external member by drive unit, be preferably motor and drive.This motor can be electric motor, particularly AC, DC, PM electric motor.In addition, also can use oil hydraulic motor, internal-combustion engine or similar device to drive pump in accordance with the present invention.
About the use of motor preferably: the spin axis of described motor extends along the fixed-direction identical with the spin axis of the member that is directly driven by described motor.This means the spin axis of motor or connect, perhaps connect with the spin axis of external member with the spin axis of internals, and this depend on internals by motor driven or external member by motor driven.The member that is directly driven by motor is not by another member drives that is connected on this motor.This means or directly drive internals and drive external member, or directly drive external member and drive internals by this external member by motor by this internals by motor.In both cases, internals externally rolls the member inboard, according to spin axis above-mentioned, motor along the direction identical with the spin axis that is driven member extend the advantage that is had is set is at motor spindle (motor axis) and be driven and do not need gear between the member axis, and especially do not need for example flexible joint of universal joint.
In addition, preferably, described external member is Duoed a tooth than described internals.The helix structure that this means the cavity inboard of member is externally Duoed a tooth or a screw thread (thread) than the helix structure in the outside of internals.
According to another preferred embodiment, described internals or described external member are arranged so that described internals or described external member can move vertically.This allows following design: because to the compensating action of axial force, the member that the can move freely member of another member drives (promptly by) does not need axial bearing.Under the situation that internals is driven by external member, preferably, internals can move vertically.On the other hand, externally under the situation of member by the internals driving, preferably, external member can move vertically, so that this member does not need axial bearing.
If internals and external member have conical in shape, and on axially displaceable member, has a surface, the pressure that is produced by pump acts on this surface so that described internals and described external member press together, and then can realize the compensation to above-mentioned axial force.Above-mentioned surface is set to carry the pressure that is produced by pump, so that produce an axial force.Preferably, this surface is the surface of vertically extending with axial direction, is preferably the end face of this member.The axial force of this generation presses together internals and external member, and resists the power that is produced by the pump chamber internal pressure between internals and the external member.This pressure in this pump chamber produces and promotes the axial force that internals and external member separate, this axial force be by act on can axially movable member lip-deep pressure compensate.Another advantage of this design is when air pump inoperative, and the contact pressure between internals and the external member reduces.Thus, can reduce wearing and tearing and tolerance.In addition, because when pumping pressure or pump head (pump head) especially are zero, between described internals and described external member, can have little gap, therefore reduced the priming of pump torque.By increase pumping pressure, make act on can axially movable member lip-deep pressure increase, and the power that acts on this member and internals and external member are pressed together is increased.
Because under the lower situation of pressure, friction meeting between internals and the external member reduces because of the reduction of the impacting force under the low pumping pressure, therefore by utilizing the pumping pressure that increases that the impacting force of internals and external member is increased, can reduce the frictional loss in the pump.
Being used for to the surface that the member that moves applies axial force at pumping pressure is under the situation of an end face of this member, can is regulated or limit by selecting this surface or regional size by the axial force that pumping pressure produces.The zone that pumping pressure applies can limit by the diameter of radial bearing.Therefore, by selecting the suitable diameter of radial bearing, can obtain desirable surface area.
The member that can not move vertically is preferably along being axially fixed on the motor drive shaft.Axially displaceable member preferably radially is fixed in the radial bearing.
Material or fluid according to the pumping of screw pump of the present invention institute preferably axially move through described pump along straight line basically.This means that the pump chamber between external member and internals is progressive in the axial direction along straight line when internals and external member during around its longitudinal axis rotation.
In addition, preferably, this pump comprises the shell with entrance and exit, and described internals and described external member are arranged in the described shell.
Description of drawings
From following only the detailed description and the accompanying drawings, will understand the present invention more completely as example.In the drawings:
Fig. 1 is the schematic sectional view according to screw pump of the present invention;
Fig. 2 is the schematic sectional view according to second embodiment's screw pump;
Fig. 3 is the schematic sectional view according to the screw pump of third embodiment of the invention;
Fig. 4 is the schematic sectional view of the setting of the internals of a fourth embodiment in accordance with the invention and external member;
Fig. 5 is the schematic sectional view of internals and external member;
Fig. 6 is the sectional view with internals of a screw thread;
Fig. 7 is the schematic sectional view with external member of two screw threads; And
Fig. 8 is the schematic sectional view with external member of ten teeth or ten screw threads.
Embodiment
As according to shown in the example of Fig. 1, screw pump comprises internals 2 and external member 4.Two members are taper, that is, internals 2 has the external shape of taper, and the cavity of external member 4 has the interior shape of taper, so that internals 2 is assembled in the external member 4.The internal surface of the outer surface of internals 2 and external member 4 has spiral-shaped, and the helix structure of external member 4 is Duoed a screw thread than the helix structure of internals 2.Internals 2 and external member 4 all are arranged in pump case or the shell 6.
Internals 2 is fixed on the motor drive shaft (not shown).Motor drive shaft is along the longitudinal axis X of internals 2 1Extend.This motor drive shaft drives internals 2 around forming the first spin axis X 1Longitudinal axis X 1Rotation.External member 4 is installed in the radial bearing 8 of shell 6 inside.External member 4 can form the second spin axis X around it 2Longitudinal axis X 2Rotation.In addition, external member 4 in shell 6 and supporting member 8 inside along longitudinal axis X 2And can move in the axial direction.Radial bearing 8 is fixed in the shell 6.
When internals 2 during by motor driven, internals 2 rotations so that externally roll on the interior week of member 4, drive external member 4 thus around its longitudinal axis X 2Rotation.According to the pump of Fig. 1 on the pressure side the diameter of internals 2 and external member 4 less a side on, the suction side is on the bigger opposite side of diameter.The fluid for the treatment of pumping 10 enters pump case 6 by entering the mouth, and is pumped to outlet 12.Therefore, be parallel to longitudinal axis X on the pumping pressure edge at outlet 12 side places 2The direction of arrow A compressing external member 4 and working, thereby external member 4 is pressed against the outside of internals 2.This just can increase the pressure between external member and the internals by increasing pumping pressure.When air pump inoperative, this power can be reduced to zero, thereby can obtain low starting torque.
Because longitudinal axis or spin axis X 1And X 2Therefore incline towards each other, can obtain from exporting 12 throw of eccentric that reduce to inlet 10 side lines, so that obtain the constant flow rate of pump.If described each spin axis is parallel, then owing to the conical in shape of internals 2 and external member 4, pump will transfer out non-constant flow.
The second different embodiments has been shown among Fig. 2.According to the embodiment of Fig. 2 have equally external member 4 ' and internals 2 ', the setting of described external member and internals and design are as above relevant with first embodiment description.First embodiment and second embodiment's difference is, according to second embodiment, and external member 4 ' drive by motor (not shown in Fig. 2).External member 4 ' driving internals 2 '.Therefore, internals 2 ' be installed as can rotation on the supporting member 14 that is arranged on the fixing inlet duct 16.Supporting member 14 is a radial bearing, thus internals 2 ' can move along the axial direction that is parallel to inlet duct 16 longitudinal axis.In addition, internals 2 ' can center on this longitudinal axis rotates.With the embodiment of Fig. 1 accordingly, second longitudinal axis rotation of external member 4 ' can tilt around longitudinal axis with respect to inlet duct 16.External member 4 ' with motor drive shaft is connected and is installed in axially and in the radial bearing.
Pump be arranged on pump case with inlet duct 16 and outlet 18 or shell 6 ' in.The live axle of external member 4 passes the shaft seal 20 that prevents that motor and pump from leaking.
When beginning rotation, will produce pumping pressure by pump or pump head respectively, and this pumping pressure acts on surface 22, be pump internals 2 ' outlet or axial end on the pressure side on.Therefore, thus this pressure apply with the described external member 4 of described internals 2 ' be pressed in ' go up make internals 2 ' and external member 4 ' between contact force or the power that increases of contact pressure.Thus, reduced the internal leakage of pump.This design can realize internals 2 ' and external member 4 ' between under high pressure anti-leak closely contact (leakage tight contact), and reduce under low pressure simultaneously or the friction when air pump inoperative, from then on do not have the pressure effect on the surface on 22, thus make internals 2 ' and external member 4 ' between contact pressure reduce.
Fig. 3 show with according to the corresponding embodiment of the embodiment of Fig. 1.As can be seen, the spin axis X of motor and internals 2 1Longitudinal rotating shaft line X with respect to external member 4 2Tilt.Motor 24 is connected on the pump case 6, and motor drive shaft 26 passes Sealing 28.
In the embodiment according to Fig. 1 and Fig. 3, internals 2 drives external member 4.The speed of external member is that the product by the ratio of the tooth of the speed of internals 2 and described internals and external member or screw thread decides.This means if described internals has circular cross section (having a tooth or a screw thread) as shown in Figure 6, then described external member cross section is the circle (having two screw threads or two teeth) of elongation as shown in Figure 7, and the rotating speed of external member 4 will be half of rotating speed of internals 2.On the other hand, if described internals has nine teeth or nine screw threads, then described external member has ten teeth or ten screw threads shown in the cross section of Fig. 8, and the speed of described external member will be described internals speed 9/10ths.
Motor 24 can be electric motor AC, DC, PM or oil hydraulic motor, internal-combustion engine or similar device.
Fig. 4 shows the another kind of possible setting of external member 4 " and internals 2 ".According to the embodiment of Fig. 4, pump on the pressure side or export on the smaller diameter end of 30 internals 2 that are arranged on taper " and external member 4 of taper "." effect, internals 2 " is provided with inner passage 32 to make internals compress external member 4 in order to reach by the pumping pressure of outlet on 30 sides, and this inner passage 32 is from the pressure side 30 along internals 2 " longitudinal axis extend towards opposition side.Passage 32 is widened in these opposite sides, so that form direction and 30 facing surfaces 34 on the pressure side.Thus, the outlet pressure that pump produces acts on the surface 34, and on by increased pressure as indicated above internals 2 " being pressed against external member 4 ".
In addition, it should be understood that all and the scheme of discussing relatively according to the embodiment of Fig. 1 to Fig. 3 also can be applied to the embodiment according to Fig. 4.
Usually, progressive cavity pump (PCP) or screw pump have two and rotate relative to one another and relative to each other along the parts (inner member 2 and external component 4) of eccentric orbiting motion.According to the present invention, the spin axis X of the inclination that this can be by inner member and external component 1And X 2Realize.
As shown in Figure 5, the different shape in the cross section is the shape of the spherical section of sphere centre point along the intersection point with two spin axiss especially, can be made of the hypocycloidal a plurality of fragments that are connected with epicycloid.Perhaps, this epicycloid can form and hypocycloid intended distance or skew apart.In the axial direction, this cross section is around longitudinal axis rotation, forming at least one screw thread or a tooth on the outside of inner member, and externally forms at least two screw threads or two teeth on the inboard of parts 4.
For for n flank profil of the inboard of n+1 flank profil (tooth shape) running, the screw thread of inner member or the quantity of tooth are (n+1)/n times of quantity of the screw thread of external component or tooth.The center of internals 2 is with respect to the misalignment of external member 4, and this center is that the circle of e (throw of eccentric) moves along radius.In the case, because the cause of conical in shape, throw of eccentric is vertically held to another from a vertical end of pump to be increased.
Reference numerals list
2,2 ', 2 ": internals
4,4 ', 4 ": outside member
6: shell
8: radial bearing
10: entrance
12: outlet
14: supporting member
16: the entrance pipe
18: outlet
20: Sealing
22: the surface
24: motor
26: motor drive shaft
28: Sealing
30: outlet
32: passage
34: the surface
X 1: first spin axis
X 2: second spin axis
A: the direction of axial force

Claims (10)

1. screw pump, it has spiral pump external member (4; 4 ') and be arranged on this external member (4; 4 ') inner spiral pump internals (2; 2 '), this external member (4 wherein; 4 ') inside and this internals (2; 2 ') be taper,
It is characterized in that:
This internals (2; 2 ') can be around the first fixing spin axis (X that forms of this internals 1) longitudinal axis (X 1) rotation, and this external member (4; 4 ') can be around the second fixing spin axis (X that forms of this external member 2) longitudinal axis (X 2) rotation,
This first spin axis (X wherein 1) and this second spin axis (X 2) incline towards each other, and
This internals (2; 2 ') by this external member (4; 4 ') driving, perhaps this external member (4; 4 ') by this internals (2; 2 ') drive.
2. screw pump as claimed in claim 1 is characterized in that, described internals (2; 2 ') and/or described external member (4; 4 ') at least a portion make by at least a rigid material.
3. screw pump as claimed in claim 2 is characterized in that, described internals (2; 2 ') and/or described external member (4; 4 ') make by stupalith.
4. each described screw pump in the claim as described above is characterized in that described internals (2; 2 ') or described external member (4; 4 ') drive by drive unit, this drive unit is preferably motor (24).
5. as 4 described screw pumps in the claim, it is characterized in that described internals (2; 2 ') or described external member (4; 4 ') drive by motor (24), the spin axis of wherein said motor extends along the direction identical with the described spin axis of the described member that is driven by described motor (24).
6. each described screw pump in the claim as described above is characterized in that described external member (4; 4 ') than described internals (2; 2 ') many teeth.
7. each described screw pump in the claim as described above is characterized in that described internals (2; 2 ') or described external member (4; 4 ') be arranged so that described internals (2; 2 ') or described external member (4; 4 ') can move vertically.
8. screw pump as claimed in claim 7 is characterized in that, the pressure that is produced by this pump acts on the surface of the described member that can move vertically, and the effect of this pressure produces and makes this internals (2; 2 ') and this external member (4; 4 ') axial force that presses together.
9. each described screw pump in the claim as described above is characterized in that the basic upper edge of material that is pumped or fluid straight line axially moves through described pump.
10. each described screw pump in the claim as described above is characterized in that this pump comprises shell (6; 6 '), this shell (6; 6 ') have an inlet (10; 16) and the outlet (12; 18), and described internals (2; 2 ') and described external member (4; 4 ') be arranged on described shell (6; 6 ') in.
CN2007800230444A 2006-06-30 2007-06-29 Moineau pump Expired - Fee Related CN101473139B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DKPA200600885 2006-06-30
DKPA200600885 2006-06-30
PCT/EP2007/005787 WO2008000505A1 (en) 2006-06-30 2007-06-29 Moineau pump

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Publication Number Publication Date
CN101473139A true CN101473139A (en) 2009-07-01
CN101473139B CN101473139B (en) 2013-08-28

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EP (1) EP2035708B1 (en)
CN (1) CN101473139B (en)
AT (1) ATE508279T1 (en)
DE (1) DE602007014364D1 (en)
WO (1) WO2008000505A1 (en)

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CN107002667A (en) * 2014-11-14 2017-08-01 兵神装备株式会社 Fluid delivery system
CN109538301A (en) * 2017-09-21 2019-03-29 阿特拉斯·科普柯空气动力股份有限公司 Cylinder symmetric Stirling engine
CN110945244B (en) * 2017-06-27 2021-11-19 纬湃科技有限责任公司 Screw spindle pump, fuel delivery assembly and fuel delivery unit

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DE202009002823U1 (en) * 2009-03-02 2009-07-30 Daunheimer, Ralf Cavity Pump
WO2015124918A1 (en) * 2014-02-18 2015-08-27 Vert Rotors Uk Limited Rotary positive-displacement machine
US9776739B2 (en) 2015-08-27 2017-10-03 Vert Rotors Uk Limited Miniature low-vibration active cooling system with conical rotary compressor
US10174973B2 (en) 2015-08-27 2019-01-08 Vert Rotors Uk Limited Miniature low-vibration active cooling system with conical rotary compressor

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USRE21374E (en) * 1940-02-27 Gear mechanism
DE2632716A1 (en) * 1976-07-21 1978-01-26 Martin Theodor Melchior LIQUID PUMP, ESPECIALLY FOR PLASTER STARTING DEVICES
US5759019A (en) * 1994-02-14 1998-06-02 Steven M. Wood Progressive cavity pumps using composite materials
US6361292B1 (en) * 2000-04-12 2002-03-26 Sheldon S. L. Chang Linear flow blood pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103775334A (en) * 2014-02-13 2014-05-07 北京工业大学 Conical threaded rod-bushing pair
CN103775334B (en) * 2014-02-13 2016-01-13 北京工业大学 A kind of Conic thread rod-lining pair
CN107002667A (en) * 2014-11-14 2017-08-01 兵神装备株式会社 Fluid delivery system
CN110945244B (en) * 2017-06-27 2021-11-19 纬湃科技有限责任公司 Screw spindle pump, fuel delivery assembly and fuel delivery unit
CN109538301A (en) * 2017-09-21 2019-03-29 阿特拉斯·科普柯空气动力股份有限公司 Cylinder symmetric Stirling engine

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DE602007014364D1 (en) 2011-06-16
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WO2008000505A1 (en) 2008-01-03
EP2035708A1 (en) 2009-03-18
CN101473139B (en) 2013-08-28

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