JPWO2016047331A1 - 遠心ポンプの製造方法 - Google Patents
遠心ポンプの製造方法 Download PDFInfo
- Publication number
- JPWO2016047331A1 JPWO2016047331A1 JP2016550041A JP2016550041A JPWO2016047331A1 JP WO2016047331 A1 JPWO2016047331 A1 JP WO2016047331A1 JP 2016550041 A JP2016550041 A JP 2016550041A JP 2016550041 A JP2016550041 A JP 2016550041A JP WO2016047331 A1 JPWO2016047331 A1 JP WO2016047331A1
- Authority
- JP
- Japan
- Prior art keywords
- centrifugal pump
- bearing
- blood
- lid member
- bottom member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 0 CC1(*)c(cccc2)c2*(C)=C1 Chemical compound CC1(*)c(cccc2)c2*(C)=C1 0.000 description 2
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
-
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- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/205—Non-positive displacement blood pumps
- A61M60/216—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller
- A61M60/226—Non-positive displacement blood pumps including a rotating member acting on the blood, e.g. impeller the blood flow through the rotating member having mainly radial components
- A61M60/232—Centrifugal pumps
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- A61M60/40—Details relating to driving
- A61M60/403—Details relating to driving for non-positive displacement blood pumps
- A61M60/419—Details relating to driving for non-positive displacement blood pumps the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets
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- A61M60/80—Constructional details other than related to driving
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- A61M60/818—Bearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K26/282—Seam welding of curved planar seams of tube sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
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- B23K26/32—Bonding taking account of the properties of the material involved
- B23K26/324—Bonding taking account of the properties of the material involved involving non-metallic parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
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- B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
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- B29C66/7311—Thermal properties
- B29C66/73115—Melting point
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7496—Pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/021—Units comprising pumps and their driving means containing a coupling
- F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
- F05D2230/234—Laser welding
Abstract
Description
(1) 中空体で構成され、その中空部に連通し、血液が流入する血液流入口と、前記中空部に連通し、前記血液流入口から流入した血液が流出する血液流出口とを有するハウジングと、
前記中空部内に回転可能に収納され、その回転により血液に遠心力を付与する遠心力付与部材と、
前記遠心力付与部材を前記ハウジングに対し回転可能に支持する支持機構とを備え、
前記支持機構は、前記遠心力付与部材の回転中心に設置され、前記遠心力付与部材の回転軸として機能する軸部材と、
前記軸部材の一端部を回転可能に支持する第1の軸受けと、
前記軸部材の他端部を回転可能に支持する第2の軸受けとを有する遠心ポンプを製造する製造方法であって、
前記ハウジングは、前記第1の軸受けが設置される蓋部材と、前記第2の軸受けが設置される底部材とを前記回転軸方向に組立てた組立状態で接合されてなるものであり、
前記組立状態とする組立工程と、
前記組立状態で、前記蓋部材と前記底部材とが互いに接近する方向に加圧を行いつつ、前記蓋部材と前記底部材との接合を行う接合工程とを有することを特徴とする遠心ポンプの製造方法。
前記接合工程後の前記第1の軸受と前記第2の軸受との離間距離D1は、離間距離D0よりも小さい上記(1)に記載の遠心ポンプの製造方法。
前記接合工程では、前記易変形部を変形させることにより、前記離間距離D1を調節する上記(1)ないし(3)のいずれかに記載の遠心ポンプの製造方法。
前記接合工程では、前記境界部に光吸収材を介在させた状態で前記光吸収材に前記レーザ光を照射することにより前記融着を行う上記(5)に記載の遠心ポンプの製造方法。
図1は、本発明の製造方法により製造される遠心ポンプの実施形態を示す断面側面図である。図2は、図1に示す遠心ポンプの断面平面図である。図3は、本発明の遠心ポンプの製造方法を示す縦断面図であって、用意工程を示す図である。図4は、本発明の遠心ポンプの製造方法を示す縦断面図であって、接合工程を示す図である。図5は、本発明の遠心ポンプの製造方法を示す縦断面図であって、図3に示すハウジングの部分拡大図である。
遠心ポンプ1の製造方法は、[1]用意工程と、[2]光吸収材供給工程と、[3]組立工程と、[4]接合工程とを備えている。
図3および図4に示すように、まず、底部材21、蓋部材22、回転体3、支持機構4および治具8を用意する。
次に、図3に示すように、レーザ光を吸収する光吸収材200を蓋部材22の薄肉部223の表面に塗布(供給)する。光吸収材200としては、例えば、カーボンブラック等の粉末、該粉末や後述する染料を含む液状(ペースト状)のもの、または該粉末や該染料を含むシート状(層状)のものが挙げられる。
図4に示すように、回転体3および支持機構4を内側に収納するように、底部材21および蓋部材22を組立てる。このとき、蓋部材22の外周面223aは、底部材21の内周面212aによって案内されるため、底部材21に対して容易に位置決めされる。これにより、容易に組立状態とすることができる。
次に、図4に示すように、レーザ光LLを光吸収材200に向って照射する。レーザ光LLは、底部材21の薄肉部212を透過して、光吸収材200に照射される。光吸収材200に照射されたレーザ光LLは、効率良く光吸収材200に吸収され、熱に変わるので、低出力で効率的に融着を行うことができる。
以上の工程を経て遠心ポンプ1を得ることができる。
(実施例1)
図1〜図5に示すような遠心ポンプを作製した。この遠心ポンプでは、ハウジング(底部材および蓋部材)および遠心力付与部材は、ポリカーボネートで構成されている。底部材のバネ定数は、161N/mmであり、蓋部材のバネ定数は、308N/mmであった。
接合工程において比D1/D0が表1に示す割合になるように加圧を行ったこと以外は、前記実施例1と同様にして、実施例2の遠心ポンプを得た。
接合工程において比D1/D0が表1に示す割合になるように加圧を行ったこと以外は、前記実施例1と同様にして、実施例3の遠心ポンプを得た。
接合工程において比D1/D0が表1に示す割合になるように加圧を行ったこと以外は、前記実施例1と同様にして、実施例4の遠心ポンプを得た。
接合工程において比D1/D0が表1に示す割合になるようにした、すなわち加圧を行わなかった以外は、前記実施例1と同様にして、比較例の遠心ポンプを得た。
接合工程において比D1/D0が表1に示す割合になるように加圧を行ったこと以外は、前記実施例1と同様にして、比較例2の遠心ポンプを得た。
模擬的使用状態で、実施例1〜4および比較例1、2の遠心ポンプについて、軸部材の回転数2600rpm、血液流量8L/minで溶血が生じたか否かを測定した。
◎ :現存する遠心ポンプよりも非常に優れている。
○ :現存する遠心ポンプよりも優れている。
× :現存する遠心ポンプと同等か、または、それよりも劣る。
これらの評価結果1を表1に示す。
2 ハウジング
3 回転体
4 支持機構
5 軸部材
6 第1の軸受け
7 第2の軸受け
8 治具
20 ハウジング本体
21 底部材
22 蓋部材
24 ポンプ室
25 血液流入ポート
26 血液流出ポート
31 血液流路
32 上面
33 外周面
34 永久磁石
51 上端面
52 下端面
61 下面
62 湾曲凹面
71 上面
72 湾曲凹面
81 保持具
82 加圧具
100 融着部
200 光吸収材
211 側壁
212 薄肉部
212a 内周面
212b 端面
213 厚さ一定部
213a 端面
221 天板
222 側壁
223 薄肉部
223a 外周面
223b 端面
224 厚さ一定部
224a 端面
225 第2の軸受け設置部
241 間隙
251 屈曲部
252 根元部
253 接続部
254 第1の軸受け設置部
300 重なり部
811 凹部
821 内部空間
822 下端面
D 離間距離
LL レーザ光
L 距離
L0 距離
L1 距離
O 回転軸
P 加圧力
Q 血液
Claims (7)
- 中空体で構成され、その中空部に連通し、血液が流入する血液流入口と、前記中空部に連通し、前記血液流入口から流入した血液が流出する血液流出口とを有するハウジングと、
前記中空部内に回転可能に収納され、その回転により血液に遠心力を付与する遠心力付与部材と、
前記遠心力付与部材を前記ハウジングに対し回転可能に支持する支持機構とを備え、
前記支持機構は、前記遠心力付与部材の回転中心に設置され、前記遠心力付与部材の回転軸として機能する軸部材と、
前記軸部材の一端部を回転可能に支持する第1の軸受けと、
前記軸部材の他端部を回転可能に支持する第2の軸受けとを有する遠心ポンプを製造する製造方法であって、
前記ハウジングは、前記第1の軸受けが設置される蓋部材と、前記第2の軸受けが設置される底部材とを前記回転軸方向に組立てた組立状態で接合されてなるものであり、
前記組立状態とする組立工程と、
前記組立状態で、前記蓋部材と前記底部材とが互いに接近する方向に加圧を行いつつ、前記蓋部材と前記底部材との接合を行う接合工程とを有することを特徴とする遠心ポンプの製造方法。 - 前記組立工程後の前記第1の軸受と前記第2の軸受との離間距離を離間距離D0としたとき、
前記接合工程後の前記第1の軸受と前記第2の軸受との離間距離D1は、離間距離D0よりも小さい請求項1に記載の遠心ポンプの製造方法。 - 前記離間距離D1は、前記離間距離D0の99%以下である請求項2に記載の遠心ポンプの製造方法。
- 前記蓋部材と前記底部材との境界部には、前記加圧により前記蓋部材および前記底部材がそれぞれ変形する易変形部が設けられており、
前記接合工程では、前記易変形部を変形させることにより、前記離間距離D1を調節する請求項1ないし3のいずれか1項に記載の遠心ポンプの製造方法。 - 前記接合工程では、前記組立状態で、前記蓋部材と前記底部材との境界部付近にレーザ光を照射することにより、前記蓋部材と前記底部材との融着を行う請求項1ないし4のいずれか1項に記載の遠心ポンプの製造方法。
- 前記蓋部材および前記底部材は、それぞれ光透過性を有するものであり、
前記接合工程では、前記境界部に光吸収材を介在させた状態で前記光吸収材に前記レーザ光を照射することにより前記融着を行う請求項5に記載の遠心ポンプの製造方法。 - 前記レーザ光は、半導体レーザによるものである請求項5または6に記載の遠心ポンプの製造方法。
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