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Publication numberCN101927038 A
Publication typeApplication
Application numberCN 201010119502
Publication date29 Dec 2010
Filing date14 Sep 2004
Priority date18 Sep 2003
Also published asCA2579637A1, CA2579637C, CN1886161A, CN1886161B, CN101927038B, EP1677856A1, EP1677856A4, US7416525, US7431688, US7682301, US7753645, US7802966, US8118724, US8579607, US8684902, US8807968, US8834342, US9533083, US9545467, US20050084398, US20050084399, US20050095151, US20080080983, US20080085184, US20080089779, US20080089797, US20080095648, US20080310963, US20100135832, US20140037477, US20140322011, US20140322020, US20170082114, US20170100528, WO2005028000A1, WO2005028872A2, WO2005028872A3
Publication number201010119502.8, CN 101927038 A, CN 101927038A, CN 201010119502, CN-A-101927038, CN101927038 A, CN101927038A, CN201010119502, CN201010119502.8
InventorsD兰西斯, R万普勒
Applicant索罗泰克公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Rotary blood pump
CN 101927038 A
Abstract
The invention relates to a rotary blood pump. Various ''contactless'' bearing mechanisms including hydrodynamic and magnetic bearings are provided for the rotary pump as alternatives to mechanical contact bearings. In one embodiment, a pump apparatus includes a pump housing (110) defining a pumping chamber (112). The housing has a spindle extending into the pumping chamber. A spindle magnet assembly (160) includes first and second magnets (262, 264) disposed within the spindle. The first and second magnets are arranged proximate each other with their respective magnetic vectors opposing each other. The lack of mechanical contact bearings enables longer life pump operation and less damage to working fluids such as blood.
Claims(10)  translated from Chinese
  1. 一种泵装置,包括:界定泵室(112)的泵壳体(110),该泵壳体有一伸入该泵室中的心轴(130);在该心轴内设置的包括第一和第二磁铁(262,264)的心轴磁铁组件(160),其中,该第一和第二磁铁的位置互相紧临,其磁向量相反。 A pump apparatus, comprising: defining a pump chamber (112) of the pump housing (110), which extends into the pump housing having a pump chamber in the mandrel (130); disposed within the mandrel comprises a first and a second magnet (262, 264) of the spindle magnet assembly (160), wherein the first and second magnet position close to each other, opposite to the magnetic vector.
  2. 2. 一种泵装置,包括:有一孔(410)的转子(120),该转子包括有至少一个叶片(121) 的叶轮;以及该转子内设置的包括第一和第二磁铁(282,284)的转子磁铁组件(180),其中,该第一和第二磁铁的位置互相紧临,其磁向量相反。 2. A pump apparatus, comprising: a hole (410) of the rotor (120), which includes at least one rotor blade (121) of the impeller; and disposed within the rotor includes first and second magnets (282, 284 ) of the rotor magnet assembly (180), wherein the first and second magnet position close to each other, opposite to the magnetic vector.
  3. 3. 一种泵装置,包括:界定泵室(112)的泵壳体(110),该泵壳体有伸入该泵室中的心轴(130);可围绕该心轴(130)转动的转子(120),该转子包括有至少一个叶片(121)的叶轮;在该转子的非叶片部内设置的磁轴承的转子部(180);以及该心轴内的该磁轴承的心轴部(160),其中,该磁轴承的心轴部和转子部互相吸引;该磁轴承的转子部和心轴部中的至少一个包括第一和第二磁铁;该第一和第二磁铁的位置互相紧临,其磁向量相反。 3. A pump apparatus, comprising: defining a pump chamber (112) of the pump housing (110), which extends into the pump housing has a pump chamber in the mandrel (130); rotatable about the mandrel (130) rotates The rotor (120), the rotor including at least one blade (121) of the impeller; disposed in the non-blade portion of the rotor of the magnetic bearing rotor portion (180); and a mandrel portion of the magnetic bearing of the mandrel within (160), wherein the mandrel portion and the rotor portion of the magnetic bearing to attract each other; rotor portion and the spindle portion of the magnetic bearing comprises at least a first and a second magnet; position of the first and second magnets close to each other, opposite the magnetic vector.
  4. 4. 一种泵装置,包括:界定一泵室(112)的泵壳体(110),该泵壳体有一伸入该泵室中的心轴(130);有一开槽孔(410)的转子(120),该转子可围绕该心轴转动,该转子包括有至少一个叶片(121)的叶轮;在该转子的非叶片部内设置的磁轴承的转子部(180);以及在该心轴内设置的该磁轴承的心轴部(160),其中,该磁轴承的心轴部和转子部互相吸引;该磁轴承的转子部和心轴部中的至少一个包括第一和第二磁铁;该第一和第二磁铁的位置互相紧临,其磁向量相反。 A pump apparatus, comprising: defining a pump chamber (112) of the pump housing (110), which extends into the pump housing having a pump chamber in the mandrel (130); there is an open slot (410) a rotor (120), the rotor rotatable about the rotation of the spindle, the rotor including at least one blade (121) of the impeller; rotor portion disposed in the non-blade portion of the rotor of the magnetic bearing (180); and in the mandrel within the setting of the magnetic bearing spindle section (160), in which the mandrel portion and a portion of the magnetic bearing rotor attract each other; trochanter and the mandrel portion of the magnetic bearing at least one includes first and second magnets ; position of the first and second magnet close to each other, opposite the magnetic vector.
  5. 5. 一种泵装置,包括:界定泵室(112)的泵壳体(110),该泵壳体有伸入该泵室中的心轴(130);可围绕该心轴(130)转动的转子(120),该转子包括有至少一个叶片(121)的叶轮;在该转子的非叶片部内设置的磁轴承的转子部(180);该心轴内设置的该磁轴承的心轴部(160),其中,该磁轴承的心轴部和转子部互相吸引;该磁轴承的转子部和心轴部中的至少一个包括第一和第二磁铁;该第一和第二磁铁的位置互相紧临,其磁向量相反;转子非叶片部承载的多个驱动磁铁(122);以及泵壳体中的驱动绕组(140),其中,驱动磁铁与驱动绕组配合而转动转子。 A pump apparatus, comprising: defining a pump chamber (112) of the pump housing (110), which extends into the pump housing has a pump chamber in the mandrel (130); rotatable about the mandrel (130) rotates The rotor (120), the rotor including at least one blade (121) of the impeller; disposed in the non-blade portion of the rotor of the magnetic bearing rotor portion (180); the magnetic bearing of the mandrel disposed mandrel portion (160), wherein the mandrel portion and the rotor portion of the magnetic bearing to attract each other; rotor portion and the spindle portion of the magnetic bearing comprises at least a first and a second magnet; position of the first and second magnets close to each other, opposite to the magnetic vector; a plurality of drive magnet rotor blade portion of non-carried (122); and a pump housing of the driving winding (140), which, driven to rotate with the rotor magnet and the driving coil.
  6. 6. 一种泵装置,包括:界定泵室(112)的泵壳体(110),该泵壳体有一伸入该泵室中的心轴(130);可围绕该心轴(130)转动的转子(120),该转子包括有至少一个叶片(121)的叶轮;在该转子的非叶片部内设置的磁轴承的转子部(180);该心轴内设置的该磁轴承的心轴部(160),其中,该磁轴承的心轴部和转子部互相吸引;该磁轴承的转子部和心轴部中的至少一个包括第一和第二磁铁;该第一和第二磁铁的位置互相紧临,其磁向量相反;泵壳体和转子中的至少一个有构作成在转子与泵壳体之间生成液力轴承的表面。 A pump apparatus, comprising: defining a pump chamber (112) of the pump housing (110), which extends into the pump housing having a pump chamber in the mandrel (130); rotatable about the mandrel (130) rotates The rotor (120), the rotor including at least one blade (121) of the impeller; disposed in the non-blade portion of the rotor of the magnetic bearing rotor portion (180); the magnetic bearing of the mandrel disposed mandrel portion (160), wherein the mandrel portion and the rotor portion of the magnetic bearing to attract each other; rotor portion and the spindle portion of the magnetic bearing comprises at least a first and a second magnet; position of the first and second magnets close to each other, opposite to the magnetic vector; the pump housing and the rotor, at least a structure made between the rotor and the pump casing to generate hydrodynamic bearing surface.
  7. 7.按权利要求3-6之一所述的泵装置,其特征在于,该磁轴承的心轴部包括位置互相紧临、磁向量互相相反的第一和第二磁铁(262,264);该磁轴承的转子部包括位置互相紧临、磁向量互相相反的第一和第二磁铁(282,284)。 7. The pump device as claimed in one of claim 3-6, characterized in that the mandrel comprises a portion of the magnetic bearing position close to each other, opposite each other, the magnetic vector of the first and second magnets (262, 264); rotor portion of the magnetic bearing includes a location close to each other, the magnetic vector in mutually opposite first and second magnets (282, 284).
  8. 8.按权利要求3-6之一所述的泵装置,其特征在于,该磁轴承的心轴部包括位置互相紧临、磁向量互相相反的第一和第二磁铁(262,264);该磁轴承的转子部包括铁磁材料。 8. The pump apparatus according to one of the claims 3-6, characterized in that the mandrel comprises a portion of the magnetic bearing position close to each other, opposite each other, the magnetic vector of the first and second magnets (262, 264); The magnetic bearing rotor portion includes a ferromagnetic material.
  9. 9. 一种泵装置,包括:界定泵室(112)的泵壳体(110),该泵壳体有伸入该泵室中的心轴(130);在该心轴内设置的包括第一和第二磁铁(262,264)的心轴磁铁组件(160),其中, 第一和第二磁铁的位置互相紧临,其磁向量互相相反;该心轴磁铁组件的纵向轴线(362) 与心轴的纵向轴线(390)偏离;以及一可围绕该心轴(130)转动的转子(120),该转子包括有至少一个叶片(121)的叶轮,其中,该转子的一孔(410)上开槽。 A pump apparatus, comprising: defining a pump chamber (112) of the pump housing (110), which extends into the pump housing has a pump chamber in the mandrel (130); disposed within the mandrel comprises a first and second magnets (262, 264) of the spindle magnet assembly (160), wherein the first and second magnet position close to each other, the magnetic vector opposite to each other; longitudinal axis of the magnet assembly of the mandrel (362) with the longitudinal axis of the mandrel (390) departing from; and a rotatable around the mandrel (130) rotatable rotor (120), which includes at least one rotor blade (121) of the impeller, wherein the rotor is a hole (410 ) on grooved.
  10. 10. 一种泵装置,包括:界定泵室(112)的泵壳体(110),该泵壳体有伸入该泵室中的心轴(130);在该心轴内设置的包括第一和第二磁铁(262,264)的心轴磁铁组件(160),其中, 第一和第二磁铁的位置互相紧临,其磁向量互相相反;一可围绕该心轴转动的转子(120), 其中,该泵壳体有构作成在转动时至少局部支撑该转子的液力轴承的表面,该转子包括有至少一个叶片(121)的叶轮;以及在转子的非叶片部中设置的多个驱动磁铁(122)。 10. A pump apparatus, comprising: defining a pump chamber (112) of the pump housing (110), which extends into the pump housing has a pump chamber in the mandrel (130); disposed within the mandrel comprises a first and second magnets (262, 264) of the spindle magnet assembly (160), wherein the first and second magnet position close to each other, the magnetic vector opposite to each other; a mandrel rotatable around the rotating rotor (120 ), wherein the pump housing has constructed that during rotation of the rotor at least partially supported hydrodynamic bearing surface, the rotor including at least one blade (121) of the impeller; and a plurality of non-disposed portion of the rotor blade drive magnet (122).
Description  translated from Chinese

旋转式血泵 Rotary blood pump

[0001] 本申请有关申请日为2004年9月14日且名称为“旋转式血泵”的申请号200480034041. 7的分案申请。 [0001] This application is September 14, 2004 and entitled "rotary blood pump" application number divisional application relating to the filing date of 200,480,034,041.7.

发明领域 Field of the Invention

[0002] 本发明涉及旋转式泵。 [0002] The present invention relates to a rotary pump. 特别涉及用于各种转子和叶轮结构的轴承。 Particularly relates to a variety of rotor and impeller bearing structures.

[0003] 发明背景 [0003] Background of the Invention

[0004] 一般旋转式泵使用一叶轮,其中,该叶轮的运动用机械接触轴承在5个自由度(两个角自由度,三个平动自由度)上受到限制。 [0004] The general use of a rotary pump impeller, wherein the impeller motion by mechanical contact bearings in five degrees of freedom (two angular degrees of freedom, three translational degrees of freedom) is restricted on. 某些工作流体会受到机械接触轴承的破坏。 Some workflow experience damage to mechanical contact bearings. 用具有接触轴承的泵抽运的血会发生血细胞溶解,即破坏血细胞。 Having contact bearings pump blood pumping blood cell lysis occurs, namely the destruction of blood cells. 一般来说,某些场合需要使用能抽运需要小心处理的工作流体如血的高效液压且高功率的泵。 In general, some applications require the use of a working fluid can be pumped need careful handling such as high blood and high power hydraulic pumps.

[0005] Wampler 等人的美国专利No. 6,234,772B1 ( "ffampIer")说明了一种有径向磁斥力轴承和轴向流体动力轴承的离心血泵。 [0005] Wampler et al., U.S. Patent No. 6,234,772B1 ("ffampIer") describes a magnetic repulsion bearing radial and axial hydrodynamic bearing effort from the pump. Woodard等人的美国专利No. 6, 250, 880B1 ( "ffoodard")说明了一种其叶轮只受液体动力支撑的离心血泵。 Woodard et al., U.S. Patent No. 6, 250, 880B1 ("ffoodard") describes an impeller which is supported only by the driving force from the liquid pump effort.

[0006] 两血泵都是基于轴向磁通间隙电动机的设计。 [0006] two blood pumps are based on axial flux motor design gap. 叶轮中携带电动机的驱动磁铁,从而用作电动机转子。 Carrying motor driven impeller magnet, which is used as the motor rotor. 在此两种情况中,驱动磁铁都位于叶轮的叶片中。 In both cases, the driving magnets are located in the impeller vanes. 驱动绕组的位置在泵室外但在用作电动机定子的泵壳体内。 Driven winding position outside the pump but is used as the motor stator of the pump housing. 由于电动机与泵一体化,因此省略了驱动轴和泵的密封。 Since the motor and pump are integrated, and the pump drive shaft are omitted seal. 该泵/电动机包括增强用于驱动叶轮的磁通的背铁。 The pump / motor comprises a back reinforcing iron impeller for driving the magnetic flux.

[0007] 两血泵的问题都是液力不足,其至少一部分的原因是将磁铁设置在叶轮叶片中要求大且非常规的叶片几何形状。 [0007] Two problems are insufficient blood hydraulic pump, at least part of the reason that the magnet disposed in the impeller blades are large and require unconventional blade geometry.

[0008] 该泵要有效工作必须克服叶片携带的磁铁与背铁之间很大的自然轴向吸力。 [0008] The pump must be overcome in order to effectively work great natural attraction between the magnet and the axial blade carried back iron. 尽管叶片与泵壳体之间不发生接触,但液力轴承会由于与液力轴承承载的负载有关的剪切力造成血细胞的破坏。 Although the contact does not occur between the blades and the pump housing, but hydrodynamic bearings and hydrodynamic bearing load due to load the relevant shear damage blood cells. 因此只使用液力轴承可能对血有害。 Therefore, the use of hydrodynamic bearings may only harmful to blood.

发明内容 SUMMARY

[0009] 鉴于公知血泵和方法的不足,旋转式泵用各种“非接触”轴承机构取代机械接触轴承。 [0009] In view of the lack of well-known methods and the blood pump, a rotary pump to replace mechanical contact bearings with a variety of "non-contact" bearing mechanism. 用各种转子和壳体设计特征实现磁轴承和液力轴承。 Rotor and the housing design with a variety of features to achieve magnetic bearings and hydraulic bearings. 这些设计特征可组合在一起。 These design features may be grouped together. 由于不使用机械接触轴承,因此泵的使用寿命延长,对工作流体如血的破坏减小。 Since no mechanical contact bearings, thus extend the life of the pump, the destruction of the working fluid, such as blood decreases.

[0010] 在一实施例中,该泵包括一磁推力轴承。 [0010] In one embodiment, the pump comprises a magnetic thrust bearing. 该泵包括界定泵室的泵壳体。 The pump includes a pump housing defining a pump chamber. 该泵壳体有伸入该泵室中的心轴。 The pump housing has inserted into the pump chamber mandrel. 该心轴设有包括第一和第二磁铁的心轴磁铁组件。 The mandrel has a spindle magnet assembly includes first and second magnets. 该心轴磁铁组件的第一和第二磁铁的位置互相紧临,其磁向量相反。 Positions of the first and second magnets magnet assembly of the mandrel close to each other, opposite to the magnetic vector. 该泵包括有可围绕该心轴转动的叶轮的转子。 The pump comprises a rotatable around the mandrel rotating impeller rotor. 该转子的非叶片部中设有包括第一和第二磁铁的转子磁铁组件。 Is provided comprising a first and a second magnet rotor magnet assembly non-blade portion of the rotor. 该转子磁铁组件的第一和第二磁铁的位置互相紧临,其磁向量相反。 Positions of the first and second magnets of the rotor magnet assembly close to each other, opposite the magnetic vector. 心轴和转子磁铁组件的相对方向选择成使得心轴和转子磁铁组件互相吸引。 Relative to the mandrel and the rotor magnet assembly is selected such that the spindle and the rotor magnet assemblies attract each other. 该转子可包括开槽孔。 The rotor may include open slots. 在各实施例中,含有的液力轴承用于径向支撑或轴向支撑或径向和轴向支撑。 In various embodiments, the radial hydrodynamic bearing for supporting or containing axial or radial support and axial support. 附图说明 Brief Description

[0011] 下面结合例示性附图举例说明本发明,在各附图中相同部件用同一标号表示,附图中: [0011] below with reference to illustrative accompanying drawings illustrate the present invention, in the drawings in which like parts are designated by the same reference numerals and wherein:

[0012] 图1为一有一被动轴向磁轴承的泵的剖面图; [0012] Figure 1 is a cross-sectional view has a passive axial magnetic bearing of the pump;

[0013] 图2示出该被动轴向磁轴承一实施例; [0013] Figure 2 shows the passive axial magnetic bearing an embodiment;

[0014] 图3示出该被动轴向磁轴承的中央和偏心设置; [0014] Figure 3 shows the passive axial magnetic bearing of the central and eccentric settings;

[0015] 图4示出一叶轮实施例;以及 [0015] Figure 4 illustrates an embodiment of the impeller; and

[0016] 图5示出该泵的一实施例用于医学中。 Embodiment [0016] Figure 5 shows the pump is used in medicine.

具体实施方式 DETAILED DESCRIPTION

[0017] 图1示出一离心血泵的一个实施例。 [0017] Figure 1 shows an effort from the pump to one embodiment. 该泵包括界定在进口114和出口116之间的泵室112的壳体110。 The pump includes defined between the inlet 114 and outlet 116 of the pump chamber 112 of the housing 110. 在该泵室中,转子120围绕从该泵壳体底部伸出的心轴130转动。 In the pump chamber, the rotor 120 around the mandrel 130 extending from the bottom of the housing of the pump rotation. 该转子还包括界定提供流体流动面的叶轮的叶片部。 The rotor further comprises providing fluid flow defining surface portion of the impeller blade. 该叶轮包括一个或多个在叶轮转动时推动流体的叶片121。 The impeller comprises one or more push the fluid in the rotating impeller vanes 121.

[0018] “转子”和“叶轮”在某些上下文中的意思相同。 [0018] "rotor" and "impeller" the same meaning in some context. 例如,转子转动时,转子的叶片部也转动,因此可以说转子转动,也可说叶轮转动。 For example, when the rotor rotates, the blade portion of the rotor is also rotated, it can be said rotor, said impeller may be rotatable. 但需要时可用“转子的非叶片部”或“叶轮之外的转子”专指转子的在叶片之外的部分。 But can be "non-blade portion of the rotor" or "outside the impeller rotor" refers specifically to the time required outside the blade portion of the rotor. 转子的每一叶片都可称为叶轮,但叶轮一般指一个或多个叶片的集合。 Each rotor blade can be called the impeller, but generally refers to one or more of the impeller blades collection.

[0019] 该泵建立在活动磁铁轴向磁通间隙电动机结构。 [0019] The pump is built on the activities of the magnet gap axial flux motor structure. 在一实施例中,该电动机为一无刷DC电动机。 In one embodiment, the electric motor is a brushless DC motor. 转子中的磁铁122的磁向量与转子转动轴线190平行。 The magnetic vector of the rotor magnet 122 and 190 parallel to the axis of rotation of the rotor. 在所示实施例中,驱动磁铁位于转子的非叶片部内。 In the illustrated embodiment, the drive magnet of the rotor blade portion of the non.

[0020] 驱动绕组140位于泵壳体内。 [0020] drive winding 140 is located inside the pump housing. 电力加到驱动绕组生成与驱动磁铁互相作用的随时间而变的电流,使得叶轮转动。 Power applied to the drive coil generates a drive magnet interaction of time-varying current, such that rotation of the impeller. 一背铁150增强电动机转子磁铁产生的磁通。 A back iron rotor magnet flux 150 enhancements generated. 在一实施例中,转子底面124或下泵壳体的相对表面118具有这样的表面(如172):在转子与壳体之间间隙小于一预定阈值时能形成液力轴承。 In one embodiment, the opposing surfaces of the rotor 124 or the bottom surface of the pump casing 118 having a surface (eg 172): to form a hydrodynamic bearing between the rotor and the housing when the gap is less than a predetermined threshold value. 在一实施例中,该预定阈值为0. 0002-0. 003英寸。 In one embodiment, the predetermined threshold is 0. 0002-0. 003 inches.

[0021] 背铁150与转子承载的驱动磁铁122之间的自然吸引会在转子上生成很大的轴向载荷。 Naturally attracted generate large axial loads on the rotor [0021] 150 and the rotor back iron bearing between driving magnet 122. 该轴向载荷存在于诸如Wampler或Woodard的轴向磁通间隙电动机结构的离心泵中。 The axial load exists in a centrifugal pump such as a Wampler or Woodard axial flux gap motor structure. Wampler和Woodard都靠液力推力轴承克服该轴向载荷力。 Wampler and Woodard have overcome this by hydrodynamic thrust bearing axial load force. 尽管叶片与泵壳体之间不发生接触,但液力轴承会由于与该液力轴承承载的负载有关的剪切力造成血细胞的破坏。 Although the contact does not occur between the blades and the pump housing, but due to the hydrodynamic bearing hydrodynamic bearing load carrying shear forces related damage to blood cells.

[0022] Wampler的径向斥力磁轴承加重了驱动磁铁与背铁之间磁吸引生成的轴向力。 [0022] Wampler radial magnetic bearing increased repulsion between the driver and the back iron magnet magnetic attraction generated by the axial force. 尽管径向斥力磁轴承生成径向稳定性,但造成很大轴向不稳定性。 Although the radial magnetic repulsion generated radial bearing stability, but caused great axial instability. 该轴向不稳定性可进一步提高轴向载荷。 The axial instability can be further improved axial load. 不管使用什么样的轴向液力轴承,该额外的轴向力造成更大的剪切力,从而造成血细胞溶解。 No matter what kind of hydrodynamic axial bearings, the additional axial force resulting in greater shear forces, resulting in hemolysis. 此外,维持液力轴承所需功率随着该载荷的增加而增加。 In addition, the power required to maintain the hydrodynamic bearing increases the load increases. 因此高负载的液力轴承的功耗大。 Thus the hydrodynamic bearing of high load power consumption.

[0023] 图1血泵包括用来减小或抵消由驱动磁铁与背铁之间的相互作用作用而施加在转子上的轴向载荷的轴向磁轴承。 [0023] Figure 1 comprises a blood pump to reduce or offset the axial magnetic bearing axially driven by the interaction effect between the magnet and the back iron applied load on the rotor. 该轴向磁轴承由位于心轴内的心轴磁铁组件160与由转子携带的转子磁铁组件180之间的相互作用形成。 The axial magnetic bearing 180 and the interaction between the rotor magnet carried by the rotor assembly is formed by a spindle magnet assembly is located within the mandrel 160. 在所示实施例中,转子磁铁组件180靠近叶轮,但转子磁铁组件的磁铁不位于叶片中。 In the illustrated embodiment, the rotor magnet assembly 180 and close to the impeller, but the magnet rotor magnet assembly is not located in the blade. 调节螺丝134通过在心轴的纵向轴线上移动心轴磁铁组件来纵向调节该轴向磁轴承的轴向位置。 Adjustment screw 134 through the longitudinal axis of the spindle magnet assembly to move the spindle vertical adjustment of the axial position of the axial magnetic bearing.

[0024] 图2示出轴向磁轴承实施例。 [0024] Figure 2 shows an axial magnetic bearing embodiment. 转子磁铁组件包括互相紧临的第一转子轴承磁铁282和第二转子轴承磁铁284。 Magnet rotor assembly includes a rotor bearing each other close to the first magnet 282 and the second magnet rotor bearing 284. 第一和第二转子轴承磁铁为永久磁铁。 The first and second rotor bearing magnets are permanent magnets. 在一实施例中,它们之间有一极片286。 In one embodiment, there is a pole piece 286 therebetween. 极片或磁通集中件用来集中转子轴承磁铁282和284生成的磁通。 Pole piece or pieces of flux concentrators to focus magnet rotor bearing 282 and 284 generate magnetic flux. 在另一实施例中,部件286只是帮助第一和第二轴承磁铁282、284定位的间隔件而不用来集中磁通。 In another embodiment, the member 286 is to help the first and second magnets 282, 284 bearing spacers positioned not to concentrate the magnetic flux. 在其他实施例中,部件286省略,因此转子磁铁组件不包括间隔件或极片部件。 In other embodiments, member 286 is omitted, and therefore the rotor magnet assembly does not include a spacer member or pole pieces.

[0025] 在一实施例中,部件282和284为单块环形永久磁铁。 [0025] In one embodiment, the member 282 and 284 as a monolithic annular permanent magnet. 轴承磁铁也可呈非单块组合物。 Bearing magnets also showed a non-monolithic composition. 例如,轴承磁铁也可呈由多个饼形、弧段形或其它形状的永久磁铁组成的环形永久磁铁结构。 For example, the magnet bearing may be annular permanent magnet structure consisting of a plurality of pie-shaped, arc-shaped permanent magnet or other shapes thereof.

[0026] 转子轴向轴承磁铁组件与转子的非叶片221部中的驱动磁铁222不同。 [0026] Non-blade rotor axial bearing 221 and the rotor magnet assembly of the drive magnet 222 is different. 在所示实施例中,驱动磁铁位于转子的非叶片部228中。 In the illustrated embodiment, the drive magnet portion of the rotor blade 228 non.

[0027] 心轴磁铁组件包括第一心轴轴承磁铁262和第二心轴轴承磁铁264。 [0027] The magnet assembly includes a first spindle spindle bearing magnet 262 and the second spindle bearing magnet 264. 第一和第二转子轴承磁铁为永久磁铁。 The first and second rotor bearing magnets are permanent magnets. 在一实施例中,它们之间有一极片266。 In one embodiment, there is a pole piece 266 therebetween. 极片266集中心轴轴承磁铁262和264生成的磁通。 266 sets the central pole piece shaft bearings 262 and 264 generated by the magnet flux. 在另一实施例中,部件266只是用作第一和第二心轴轴承磁铁定位的间隔件而不用来集中磁通。 In another embodiment, the member 266 is used as the first and second spindle bearing magnet positioned to concentrate magnetic flux without spacers. 在其他实施例中,部件266省略,因此心轴磁铁组件不包括间隔件或极片部件。 In other embodiments, member 266 is omitted, and therefore the spindle magnet assembly does not include a spacer member or pole pieces.

[0028] 在所示实施例中,永久磁铁262和264呈圆柱形。 [0028] In the illustrated embodiment, the permanent magnets 262 and 264 cylindrical. 在其它实施例中也可使用其它形状。 In other embodiments, other shapes may be used. 环形转子磁铁与叶轮一起围绕由心轴轴承磁铁组件使用的心轴纵向轴线转动。 Together with the rotor magnet ring around the mandrel wheel spindle bearings by using the magnet assembly longitudinal axis.

[0029] 心轴和转子轴承组件的永久磁铁布置成使得中间极片两边上的磁铁的磁向量互相相反。 [0029] The permanent magnet rotor spindle and the bearing assembly is arranged such that the magnetic vector of the intermediate magnet pole pieces on opposite sides of each other.

[0030] 一给定极片的两边与不同磁铁的相同极邻接。 [0030] given the same pole adjacent to the pole pieces on both sides with different magnets.

[0031] 因此,磁铁262和264的磁向量互相相反(例如N对N或S对S)。 [0031] Thus, the magnet of the magnetic vectors 262 and 264 opposite to each other (e.g. N-to-N or S S). 同样,磁铁282 和284的磁向量互相相反。 Similarly, the magnets 282 and magnetic vector 284 opposite to each other.

[0032] 各磁铁的方向选择成每当轴承在轴向上错位时建立轴向吸引。 Select the [0032] direction of each magnet into whenever bearing axial displacement in the axial build attractive. 注意到,心轴和转子磁铁组件的相对方向选择成使得心轴和转子磁铁组件互相吸引(例如S对N,N对S)。 Selected such that the spindle and the rotor magnet assemblies attract each other (e.g., S for N, N of S) relative to the direction noted, the spindle and the rotor magnet assembly. 为一组件的磁铁选定的磁向量方向决定着用于另一组件的磁铁的磁向量方向。 Determines the direction of the magnet magnetic vector component of a magnet used for another selected direction of a magnetic vector component. 表292示出第一和第二转子轴承磁铁(MR1,MR2)和第一和第二心轴轴承磁铁(MS1,MS2)的可接受的磁向量组合。 Table 292 shows the first and second rotor bearing magnets (MR1, MR2) and the first and second spindle bearing magnet (MS1, MS2) acceptable magnetic vector combinations. 使磁轴承组件发生轴向位移的背铁与驱动磁铁之间的磁吸引力至少部分地被轴向轴承之间恢复转子轴向位置的轴向磁吸引力抵消。 The magnetic bearing assembly is axially displaced in the back iron and the magnetic attraction between the drive magnet axially at least partially restored by the axial position of the rotor between the bearing axial magnetic attraction offset.

[0033] 图2还示出在转子的非叶片部的一面(例如见图1底面124)与泵壳体背部之间的间隙小于一预定阈值时形成一液力轴承一部分的楔形面或斜面272。 [0033] Figure 2 also shows the non-side portion of the rotor blade (e.g., the bottom surface 124 see FIG. 1) is formed smaller than a predetermined threshold value and the gap between the back of the pump housing a bearing part of the hydrodynamic wedge or ramp surface 272 . 在各实施例中,该预定阈值为0.0002-0. 003英寸。 In various embodiments, the predetermined threshold is 0.0002-0. 003 inches. 因此,在一实施例中,该泵包括一轴向液力轴承。 Thus, in one embodiment, the hydraulic pump comprises an axial bearing. 提供该轴向液力轴承的表面几何形状可位于转子或壳体上。 Providing the hydrodynamic axial bearing surface geometry can be located on the rotor or casing.

[0034] 尽管心轴磁铁组件用作轴向磁轴承,但心轴和转子磁铁组件之间的吸引力还有一径向分量。 [0034] Although the spindle magnet axial magnetic bearing assembly is used, but the attractiveness of the spindle and rotor magnet between components as well as a radial component. 该径向分量可用来抵消由叶轮上的压力梯度对叶轮造成的径向负载。 The radial component of the pressure gradient can be used to counteract the impeller on the impeller resulting from radial loads. 该径向分量还在开始转动时用作预加负载和在正常转动时用作偏置力防止转子围绕心轴偏心转动。 Used as the preload and used during normal rotational biasing force to prevent the rotor rotates eccentrically around the mandrel when the radial component also begins to turn. 偏心转动会造成不利于泵送作用的流体涡流或打旋。 Eccentric rotation will cause detrimental effects of pumping fluid vortex or swirling. 该偏置径向分量比方说在泵受到由移动或冲击造成的外力时有助于保持或恢复转子的径向位置和抽运作用。 Let's say that the radial component of the bias in the pump by external shocks caused by the movement or when help maintain or restore the radial position of the rotor and the pumping operation available.

[0035] 在其他实施例中也可不用与转子轴承磁铁组件互相作用的心轴磁铁组件形成该磁轴承而用铁磁材料取代a)心轴磁铁组件或b)转子轴承磁铁组件之一(但不同时取代心轴磁铁组件和转子轴承磁铁组件)。 [0035] may also be possible without the rotor magnet assembly interacting bearing spindle magnet assembly is formed of the magnetic bearing and in other embodiments, the ferromagnetic material is substituted with a) a spindle magnet assembly or b) a rotor bearing a magnet assembly of one (but not at the same time to replace the spindle magnet assembly and rotor bearing magnet assembly).

[0036] 该磁轴承仍由一心轴部和一转子部组成,但心轴部和转子部之一使用铁磁材料, 而另一部分使用永久磁铁。 [0036] The magnetic bearing still mandrel portion and a rotor portion of the composition, but one of the mandrel portion and the rotor portion using ferromagnetic material, while the other part using a permanent magnet.

[0037] 铁磁材料与磁铁相互作用在转子与心轴之间形成磁吸引。 [0037] The ferromagnetic material and the magnet interaction between the rotor and the magnetic attraction spindle formation. 铁磁材料的例子包括铁、镍和钴。 Examples of ferromagnetic materials include iron, nickel and cobalt.

[0038] 在一实施例中,铁磁材料为“软铁”。 [0038] In one embodiment, the ferromagnetic material is "soft iron." 软铁的部分特征为矫顽磁性极低。 Some of the characteristics of soft iron is very low coercivity. 因此不管其剩磁如何,软铁在外部磁场如该磁轴承系统的永久磁铁的磁场的作用下容易磁化(或再磁化)。 So regardless of how remanence, soft iron easy magnetization (or re-magnetization) in the external magnetic field, such as the role of the permanent magnet and the magnetic bearing system of the magnetic field.

[0039] 图3示出该磁轴承心轴部的各种设置位置。 [0039] Figure 3 shows various positions of the magnetic bearing disposed mandrel portion. 在一实施例中,心轴磁铁组件360的轴向与心轴的纵向轴线390重合,因此心轴和心轴磁铁组件的纵向中心轴线相同。 In one embodiment, the magnet assembly 360 of the mandrel axially of the mandrel coincides with the longitudinal axis 390, and therefore the same longitudinal central axis of the spindle and the spindle magnet assembly. 在另一实施例中,心轴磁铁组件在径向上偏移,从而心轴和心轴磁铁组件的中心轴线不同。 In another embodiment, the spindle magnet assembly is radially offset so that the central axis of the spindle and the different spindle magnet assembly. 特别是, 心轴磁铁组件360的纵向轴线362与心轴的纵向轴线390偏移。 In particular, the longitudinal axis of the spindle magnet assembly 360 longitudinal axis 362 of the mandrel 390 and the offset. 需要时可用这后一种位置设置来形成某种径向偏置力。 This latter position is set can be used to form a radially offset force is required. 叶轮上的压力差会在径向上把叶轮推向泵壳体的一边。 Differential pressure impeller in the radial direction of the impeller into the side of the pump casing. 这一径向力至少可部分地由偏移该心轴磁铁组件加以抵消。 The radial force to be at least partially offset by the offset of the spindle magnet assembly.

[0040] 尽管所示心轴和转子磁铁组件各包括2个磁元件,但磁铁组件也可各包括单块磁铁。 [0040] Although the illustrated mandrel and the rotor magnet assemblies each comprising two magnetic elements, but each magnet assembly may comprise a single piece magnet. 每组件使用多个磁元件而不使用单块磁铁可提高弹簧比率。 Each component uses a plurality of magnetic elements without using a single piece of magnet can be increased spring rate. 每组件使用两磁元件所生成的轴承比每组件使用单个磁元件可以更大弹簧比率矫正在轴向正反两个方向上离开稳定位置的位移(即稳定点之上和之下的位移)。 Each component uses two magnetic components may be generated by the bearing spring rate greater displacement correction leave stable position in the axial forward and reverse directions (i.e. displacement above and below the stable point) than each component using a single magnetic element.

[0041] 轴向磁轴承生成的磁力除了轴向分量还有径向分量。 [0041] The axial magnetic bearing magnetic force generated in addition to the radial component of the axial component as well. 该径向分量会造成叶轮的不稳定。 The radial component causes instability of the impeller. 特别是,该径向分量会造成图1或2磁轴承径向位置不稳定。 In particular, the radial component of Figure 1 or 2 will cause the radial position of the magnetic bearing is unstable.

[0042] 可使用径向液力轴承克服该径向不稳定。 [0042] can be used to overcome the radial bearing radial hydrodynamic instability. 参见图1,该泵可设计成沿转子的孔在心轴130与转子之间有一径向液力轴承(即液力滑动轴承)。 A radial hydrodynamic bearing (i.e. hydrodynamic sliding bearing) between Referring to Figure 1, the pump can be designed along the bore of the rotor 130 and the rotor spindle. 图1所示间隙夸大。 Figure 1 gap exaggerated. 液力滑动轴承需要间隙很小才能工作。 Hydrodynamic plain bearings require little space to work. 在各实施例中,该液力滑动轴承间隙为0. 0005-0. 020英寸。 In various embodiments, the hydrodynamic sliding bearing gap 0. 0005-0. 020 inches.

[0043] 可用作轴向(推力)或径向(滑动)液力轴承的表面几何形状可位于转子上,也可位于壳体(或心轴)的有关部位上。 [0043] can be used as an axial (thrust) or radial (sliding) surface geometry hydrodynamic bearing may be located on the rotor, can also be located on the relevant parts of the housing (or mandrel) of. 在一实施例中,该表面几何形状包括特征如一个或多个垫(即一生成间隙突变的特征如一高度均勻的台阶)。 In one embodiment, the surface geometry comprises one or more features such as a pad (i.e., a gap is generated mutations highly uniform characteristics such as a step). 在另一实施例中,该表面几何形状包括特征如一个或多个斜面。 In another embodiment, the surface geometry comprises one or more features such as ramps.

[0044] 图4示出包括一叶轮的转子的一实施例。 [0044] Figure 4 illustrates the impeller comprising a rotor embodiment. 该叶轮包括多个用来抽运工作流体如血的叶片420。 The impeller includes a plurality of work for pumping fluids such as blood leaves 420. 转子包括一孔410。 The rotor includes a hole 410. 转子孔与泵壳体中的心轴同纵向轴线。 Rotor hole and pump housing with a longitudinal axis of the spindle. 驱动磁铁(未示出)位于转子的非叶片部430内(即位于转子内但不在转子叶轮部的任何叶片内)。 Drive magnet (not shown) located within the non-blade portion of the rotor 430 (i.e., located inside the inner rotor but not in any vane rotor wheel portion). 因此电动机转子和叶轮一体化,从而无需驱动轴。 Therefore, the integration of the motor rotor and impeller, eliminating the need for a drive shaft. 没有驱动轴就不需要轴密封。 Do not need no drive shaft shaft seal.

[0045] 在一实施例中,转子孔上开槽。 [0045] In one embodiment, the slotted hole on the rotor. 特别是,该孔有一个或多个螺旋形槽。 In particular, the aperture has one or more helical grooves. 这些槽的轴向节距不为零。 Axial pitch of these grooves are not zero. 该槽在泵运转时与泵的工作流体连通。 The groove during operation of the pump communicates with the pump working fluid.

[0046] 图5示出泵510运转时把工作流体540从一工作流体源520传送到一工作流体目的地530。 [0046] Figure 5 illustrates operation of the pump 510 to the working fluid 540 is transferred from a working fluid source 520 to a destination 530 working fluid. 第一工作流体导管522连接该源与泵进口514。 First working fluid conduit 522 connected to the source and the pump inlet 514. 第二工作流体导管532连接泵出口516与该目的地。 Second working fluid outlet conduit 532 connecting the pump 516 and the destination. 泵把工作流体从该源传送到该目的地。 Pump the working fluid is transferred from the source to the destination. 在医疗中,该工作流体例如为血。 In healthcare, the working fluid, such as blood. 在一实施例中,该源和该目的地为动脉,因此该泵把血从一动脉传送到另一动脉。 In one embodiment, the source and the destination of the artery, so that the blood pump is transmitted from one artery to another artery.

[0047] 以上说明了可替代旋转式泵的机械接触轴承的各种“非接触”轴承。 Above [0047] illustrates an alternative rotary pump mechanical contact bearing various "non-contact" bearings. 特别用各种设计的转子、叶轮和壳体实现液力轴承或磁轴承。 Specially designed with a variety of rotors, impellers and housing to achieve hydrodynamic bearings or magnetic bearings. 这种种设计需要时可组合使用。 All these designs can be used in combination when needed. [0048] 以上结合具体例示性实施例详细说明了本发明。 [0048] above with reference to specific exemplary embodiments of the present invention is described in detail. 但可在由权利要求限定的本发明精神和范围内对之作出种种修正和改动。 But can be defined by the claims within the spirit and scope of the present invention to make various modifications and changes. 因此本说明书和附图应看出是例示性的而非限制性的。 The specification and drawings should be seen as illustrative and not restrictive.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
CN103191476A *3 Aug 201210 Jul 2013上海交通大学医学院附属上海儿童医学中心Single-fulcrum magnetomotive centrifugal blood pump
CN103957958A *27 Mar 201230 Jul 2014株式会社太阳医疗技术研究所Ventricular assist device pump
US944001227 Mar 201213 Sep 2016Sun Medical Technology Research CorporationVentricular assist blood pump
Classifications
International ClassificationA61M1/10, F04B17/00, F04B17/03, F04B35/04, F04F99/00
Cooperative ClassificationA61M1/1015, A61M1/1031, A61M1/122, A61M1/1017, A61M1/101, F04D29/048, A61M1/1036, F04D29/043, F04D29/628, F04D29/426, F04D29/22, F04D13/06, F04D1/00, A61M1/1013, F04D29/0473, F04D29/0413, F04D29/047, F16C2316/18, F16C32/044, F04D13/0666, Y10S415/90
European ClassificationA61M1/10C, F16C32/04M4, F04D29/047, F04D29/048, F04D13/06G
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