CN104246229B - 用于螺杆泵/马达的定子 - Google Patents

用于螺杆泵/马达的定子 Download PDF

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CN104246229B
CN104246229B CN201380021129.4A CN201380021129A CN104246229B CN 104246229 B CN104246229 B CN 104246229B CN 201380021129 A CN201380021129 A CN 201380021129A CN 104246229 B CN104246229 B CN 104246229B
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stator
outer tube
groove
rod member
insert
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CN104246229A (zh
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安德鲁·莫里斯
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National Oilwell Varco LP
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines 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
    • F01C1/101—Moineau-type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines 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
    • F01C1/107—Rotary-piston machines or engines 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C5/00—Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C5/00—Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable
    • F01C5/02—Rotary-piston machines or engines with the working-chamber walls at least partly resiliently deformable the resiliently-deformable wall being part of the inner member, e.g. of a rotary piston
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/10—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/107—Rotary-piston pumps specially adapted for elastic fluids 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
    • F04C18/1075—Rotary-piston pumps specially adapted for elastic fluids 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 material, 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/14—Provisions for readily assembling or disassembling
    • 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
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/802—Liners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making
    • Y10T29/49272—Cylinder, cylinder head or engine valve sleeve making with liner, coating, or sleeve

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

一种用于螺杆泵或马达的定子，所述定子包括：定子壳体，该定子壳体具有纵向轴线；以及定子插入件，该定子插入件是由材料模制在所述壳体内的；定子壳体进一步包括，外管，外管具有内表面；多个框架元件，该框架元件布置在外管的内表面上；至少一个凹部，该至少一个凹部在外管的内表面中；其中，所述框架元件与所述至少一个凹部的结合限定了多个腔室，所述腔室将插入件材料容纳在其中，因此所述插入件材料轴向地、径向地以及扭转地机械固定在所述外管内。

Description

用于螺杆泵/马达的定子
本发明涉及螺杆泵(progressive cavity pump，螺杆抽油泵)或马达的定子的构造，及其组装方法。
背景技术
螺杆(PC)泵和马达已经使用多年。螺杆泵的操作原理由ReneMoineau在他的1931年的论文中首次论述并且此后被称为Moineau原理。通常地螺杆泵或马达包括在双导程(double-lead)螺旋形腔室定子中的刚性螺旋转子。在转子与定子之间的导程的不同形成腔室，由于转子的转动腔体从定子的一端轴向地前进至另一端，将流体移动穿过泵或马达。
传统地定子由弹性的或塑性的插入件制成，插入件安置到通常地金属的、刚性的、套筒形的外管中。定子插入件的螺旋形轮廓通常通过将弹性的或塑性的材料注塑成型到围绕芯子的外管中形成。在螺杆泵常规操作过程中，转子以与定子插入件紧密接触的方式操作，在转子与定子之间产生高扭转力。因此，为了获得扭转刚性结构，定子插入件与外管之间需要紧密的粘合。此外，为了在定子插入件与外管之间设置流体密封，需要紧密的粘合。
定子插入件可仅简单地模制在裸管的内部并且通过使用粘合剂使其粘合至外管的内部而附接至外管。然而，使用粘合剂的粘合将定子的使用限制在粘合剂所需要的操作温度与化学环境下。超出所需要的温度与化学环境的操作条件可导致粘合的破坏并引起定子插入件从外管分离。
众所周知，在橡胶或弹性材料连接至刚性体的很多情况下，不只使用粘合(无论通过弹性材料的天然粘合还是通过用化学粘合剂的辅助粘合)，而且还提供机械的连接。这通过在主体中设置凹入件(re-entrant，再进入件)而可能实现，弹性材料连接至主体以实现机械联锁。还可通过设置通过一些器件固定于主体的保持架(cage)等实现，并且通过保持架模制弹性材料，虽然间接地通过保持架与主体连接，但是机械联锁也可实现。在螺杆泵和马达的情况中，这种凹入件可设置在定子管的孔中，但是，当然，设置这种凹入件有问题的。近来，已存在机械地粘合至外管的一些定子的设计(从而排除对于粘合剂的需要)，并且US-B-7407372、US-B-7316548以及US-B-7329106公开了定子插入件机械地粘合至打孔的内定子管的不同的方法，其中打孔的内定子管通过焊接连接至外定子管。内定子管包含径向开孔并且在定子材料注塑成型之间放置并且焊接至外管。
这种定子通过在外管内布置适合的锚元件来组装，并且永久地将两者固定在一起，通常在注塑成型定子材料之前，在沿管的长度的多个位置处使用焊接固定。此外，定子材料与外定子管之间的流体密封总是必需的，并且，没有使用特殊的粘合，需要实现该流体密封的另一种方式。例如在刚提及的专利中，在注塑成型之后使用按压定子材料的密封环来实现。
发明内容
根据本发明的一个方面，提供了一种用于螺杆泵或马达的定子，包括：
定子壳体，该定子壳体具有纵向轴线；以及
定子插入件，该定子插入件是由材料模制在壳体内的；
定子壳体进一步包括，
外管，该外管具有内表面；
多个框架元件，该框架元件布置在外管的内表面上；
至少一个凹部，至少一个凹部在外管的内表面中；
其中，所述框架元件与所述至少一个凹部的结合限定了多个腔室，该腔室将插入件材料容纳其中，因此所述插入件材料轴向地、径向地以及扭转地(torsionally，扭力地)机械固定在外管内。
框架元件优选地是多个杆件。该杆件可轴向延伸，大体平行于所述纵向轴线并且在外管的内表面彼此周向地间隔。
可替代地，杆件可以是环形的，围绕外管的内表面延伸并且相对于所述纵向轴线彼此轴向地间隔。
优选地，框架元件具有圆形的或椭圆形的截面形状。当螺杆泵或马达在操作时，框架元件的光滑的或圆的轮廓使定子插入件材料的损坏的风险最小化。
优选地，框架元件焊接至所述外管的所述内表面。
在一个实施方式中，所述至少一个凹部包括螺旋形凹部，该螺旋形凹部局部或全部地轴向地沿外管的内表面延伸。
可替代地，所述至少一个凹部包括多个凹部，例如轴向地间隔的环形凹槽。进一步可替代地，凹部可包括周向地间隔的线性凹槽，该线性凹槽相对于纵向轴线平行地延伸。
凹槽可以是轴向或周向等距地间隔。优选地，所述凹槽具有大体正方形或矩形的截面形状。
在本发明的第二方面，提供了大体如本文和/或参考附图所述的一种定子壳体。
在本发明的第三方面，提供了如前述段落中的任何一段描述的一种组装定子的方法，该方法包括以下步骤：
将模芯子布置在外管内；
将液体定子插入件材料注射到外壳体与芯子之间，使得材料渗透进入腔室；以及
当材料固化后移除芯子。
附图说明
参照附图，仅以实例的方式描述本发明的优选实施方式，在附图中：
图1示出了根据本发明的实施方式的定子壳体的部件的立体视图；
图2示出了图1的定子壳体的细节截面视图；
图3示出了图1的定子壳体的端视图；
图4示出了根据本发明的实施方式的定子的截面图，其中具有固定到位的定子插入件；以及
图5示出了图4的定子壳体的立体视图。
具体实施方式
参考图1至图3，提供了用于螺杆(PC)泵或马达的定子的定子壳体100。该壳体包括套管形的外管120并且具有纵向轴线101。
外管120在其内表面上设置有杆件130的形式的多个框架元件。在示出的实施方式中，大体线性的杆件130沿管120的内表面在轴向方向上延伸并且优选地是周向等距地间隔的。
在可替代的实施方式中(未示出)，框架元件包括多个大体环形的杆件，该杆件沿外管的纵向轴线轴向地间隔。框架元件的其他实施方式是可设想的。
杆件可由软钢(mild steel，低碳钢)制成并且焊接至管的内表面，虽然其他材料与固定方法是可能的。杆件优选地具有圆形(如示出的)或椭圆形截面形状。虽然具有光滑的、圆形的或另外的非钝的轮廓对于杆件是有优势的(下文陈述理由)，其他截面形状是也可能的。
外管120在其内表面设置有至少一个凹部。在示出的实例中，至少一个凹部包括多个环形的凹槽140。该凹槽140沿外管轴向地间隔，并且是优选地，虽然非必要地，该凹槽沿管的整个长度延伸。
在可替代的实施方式中(未示出)，至少一个凹部是在外管的内表面的一个或更多个螺旋形的凹槽。
在另一个可替代实施方式中(未示出)，至少一个凹部包括在外管的内表面上的多个线性的凹槽，该线性的凹槽在大体平行于纵向轴线的轴向方向上延伸。线性的凹槽优选地是圆周地等距的间隔的。
凹槽具有大体正方形的或矩形的截面形状，虽然其他形状是可能的。正方形的或矩形的截面形状具有清晰限定侧壁的优势，该侧壁在使用中改善在定子插入件材料上的轴向力的阻力。凹槽可分别地机器加工到外管的内表面中。
如在图2中最佳看到的，框架元件与凹部的结合限定了在外管120的内表面中的腔室150。在示出的实施方式中，在每个线性的杆件130中的一个穿过环形凹槽140中的一个的位置处限定了腔室150。
每个腔室150的壁部与底部由凹槽140限定，同时腔室150的“顶部”由杆件130提供。腔室的“顶部”未闭合或未密封。这部分地因为杆件与凹槽没有实际交叉(杆件径向地定位于凹槽内部)，并且部分地因为凹槽延伸(取决于实施方式，轴向地、螺旋地或者周向地)超出杆件的与凹槽一致的小区域。
图4和图5示出了包括定子插入件110的定子壳体。定子插入件通常通过模制形成。在壳体100组装后，将具有双螺旋螺纹线或更多螺旋螺纹线形式(未示出)的模芯子以已知的方式插到壳体100的孔中。将弹性材料注射到在芯子与壳体之间的环形空间中，使得弹性材料渗透进入凹槽140并且特别地，进入腔室150。当将弹性的或可塑的定子材料注射到壳体100中时，杆件130嵌入定子插入件110的材料中。定子插入件的材料还延伸至外管120的内表面。
通常地，一旦冷却，注入的定子插入件材料径向向内地收缩。通过纵向杆件130的存在抵制该趋势，纵向杆件使定子插入件110保持紧密地抵靠外管的内表面，通过在腔室150中存在的定子插入件材料辅助抵制该趋势。
通过在腔室150中存在的定子插入件材料以及特别地是凹槽140的深度，抵制在定子插入件110与外管120之间的轴向力。凹槽140的正方形的或矩形的截面形状凭借此凹槽的良好地限定的侧壁进一步辅助抵制轴向力。
在螺杆泵的操作性的使用中，在定子插入件110与外管120之间存在显著的扭转力。通过纵向杆件130的存在来抵制该力。每个杆件的弯曲的外边缘或圆形的轮廓减小了剪断或在定子插入件材料附近以其他方式损坏的风险。这给予本发明超过使用圆形的或其他钝边开孔(定子插入件材料通过该开孔模制)的现有技术系统的特别的优势。在具有整合的轴向开孔的内定子管的现有技术中，通过该纵向开孔模制的定子插入件材料本质上是大体圆形的。上文提及的在转子与定子之间的高轴向力或高扭转力意味着对于圆形开孔的钝边增加了剪断的风险或增加了以其他方式损坏贯穿该圆形开孔模制的定子插入件材料的风险。
使用本发明的定子110的机械保持力足以避免依赖化学粘合剂的需要，在化学粘合剂可能失效的高温操作下时这是特别有优势的。为了进一步改善在定子壳体中的定子插入件的保持力，在低操作温度下，本发明可能与化学粘合剂结合使用。
在整个描述和本说明书的权利要求中，词语“包括(comprise)”与“包含(contain)”以及它们的变型意味着“包括但不限于”，并且它们并不意指(并且不)排除任何其他部分、附加物、部件、整体或步骤。在整个描述和本说明书的权利要求中，单数包括复数，除非上下文另有要求。特别是，当使用不定冠词时，本说明书应理解为考虑到复数以及单数，除非上下文另有要求。
除非有不兼容的说明，结合本发明的特定方面、实施例或示例描述的特征、整体、特性、化合物、化学部分或基团应被理解为适用于本文所描述的任何其它方面、实施例或示例。所有在本说明书(包括所附的权利要求书、摘要和附图的任何一个)中公开的特征，和/或所有如此公开的任何方法或过程的步骤，可以以任何组合来结合，除了这样的特征和/或步骤中的至少一些是互斥的组合。本发明不限于任何前述实施方式的细节。本发明延伸至在本说明书中公开的所有特征(包括所附的权利要求书、摘要和附图的任何一个)的任何新颖性的一个或任何新颖性的组合，或如此公开的任何方法或过程的步骤的任何新颖性的一个或任何新颖性的组合。
读者的注意力被引导到与和本申请有关的说明书同时提交或先于和本申请有关的说明书提交的所有论文和文献，并且这些论文和文献与本说明书公开给公众查阅，并且所有这些论文和文献的内容通过引用结合于此。

Claims (7)

1.一种用于螺杆泵或马达的定子，所述定子包括：
定子壳体，所述定子壳体具有纵向轴线；以及
定子插入件，所述定子插入件为模制在所述壳体内的材料；
所述定子壳体进一步包括，
外管，所述外管具有内表面；
多个线性的杆件，所述多个线性的杆件布置在所述外管的内表面上，其中，所述杆件在所述外管的内表面上大体平行于所述纵向轴线轴向地延伸并且彼此周向地间隔；
多个轴向间隔的环形的凹槽，所述多个轴向间隔的环形的凹槽在所述外管的内表面中，
其中，所述杆件穿过所述凹槽；
其中，所述杆件与所述凹槽的结合在所述外管的内表面中限定了多个腔室，其中，每个腔室在一个所述杆件之下布置在一个所述凹槽中，其中，定子插入件的材料延伸到所述凹槽中，因此所述定子插入件的材料轴向地、径向地以及扭转地机械固定在所述外管内。
2.根据权利要求1所述的定子，其中，所述杆件具有圆形的或椭圆形的截面形状。
3.根据前述权利要求中任一项所述的定子，其中，所述杆件焊接至所述外管的内表面。
4.根据权利要求1所述的定子，其中，所述凹槽具有大体正方形的或矩形的截面形状。
5.根据权利要求1所述的定子，其中，所述杆件在所述外管的内表面上彼此周向等距地间隔。
6.根据权利要求1所述的定子，其中，所述外管的内表面中的环形的凹槽沿所述外管的整个长度设置。
7.一种组装根据前述权利要求中任一项所述的定子的方法，所述方法包括以下步骤：
将模芯子布置在所述外管内；
将液体定子插入件材料注射到外部壳体与芯子之间，使得所述材料渗透进入所述腔室；以及
当所述材料固化后移除所述芯子。
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