CN102782327A - 叶片泵 - Google Patents

叶片泵 Download PDF

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CN102782327A
CN102782327A CN2010800537064A CN201080053706A CN102782327A CN 102782327 A CN102782327 A CN 102782327A CN 2010800537064 A CN2010800537064 A CN 2010800537064A CN 201080053706 A CN201080053706 A CN 201080053706A CN 102782327 A CN102782327 A CN 102782327A
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rotor
vane pump
drivening piece
pin
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T·许泽
A·吕特尔
U·舒伯特
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Hella GmbH and Co KGaA
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Hella KGaA Huek and Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • 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
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3446—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • 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
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3446—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C29/0071—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • F16D1/0876—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with axial keys and no other radial clamping
    • 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
    • F04C2240/20—Rotors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

本发明涉及一种叶片泵(1)，其包括电驱动单元、与该电驱动单元相连的泵腔(2)以及转子(7)，电驱动单元包括电动机和电动机轴(6)，转子包括一定数量的滑动件(8)，该转子在泵腔(2)内部与电动机轴(6)同心地布置，电动机轴(6)通过抗旋转地与电动机轴(6)相连的带动件(9)与转子(7)接合并且该带动件(9)具有至少一个带动销(90)，该带动销嵌入与该带动销对应的转子空隙(72)中，所述至少一个转子空隙(72)构造成椭圆形的，并且带动销(90)这样构造轮廓，即两个微弱弯曲的第一轮廓部段(91、92)分别构成一个与转子空隙(72)的各一个长的表面部段(721)接触的接触区域。

Description

叶片泵
技术领域
本发明涉及一种叶片泵，其包括电驱动单元、与该电驱动单元相连的泵腔以及转子，所述电驱动单元包括电动机和电动机轴，所述转子包括一定数量的滑动件，该转子在泵腔内部与电动机轴同心地设置，电动机轴通过抗旋转地与电动机轴相连接的带动件与转子接合并且该带动件具有至少一个带动销，该带动销嵌入与该带动销对应的转子空隙中。
背景技术
开头所述类型的叶片泵通常也被称为叶轮式回转泵，它们在现有技术中已经以不同的实施形式已知。专利文献DE 100 24 699 A1、DE 199 36 644B4、DE 10 2006 058 977 A1、DE 10 2006 058 978 A1、DE 10 2006 058 979 A1以及DE 10 2006 058 980 A1提供了叶片泵的例子。
从现有技术中已知，利用带动件实现转子与驱动轴之间的抗旋转的连接，该带动件具有一个或者多个成形为圆柱形的、具有圆形横截面的带动销。所述带动销在此与转子的对应地成形的空隙相嵌接。
已被证明的是，由于带动销的圆柱形的几何形状，导致与转子空隙的接触表面间的表面压力非常大。在此带动销可能深深地嵌入材料中，从而可能显著缩短带动销和/或转子的寿命。
发明内容
这里本发明的任务是，提供一种开头所述形式的叶片泵，在这种叶片泵中可以减少转子的磨损并从而延长转子的寿命。
本任务通过一种开头所述类型的具有权利要求1特征部分的特征的叶片泵得到解决。从属权利要求涉及到本发明的有利的进一步构成。
根据发明的叶片泵的特征在于，所述至少一个转子空隙构造成椭圆形的，并这样构造带动销的轮廓，使得两个微弱弯曲的第一轮廓部段分别构成一个与转子空隙的各一个长的表面部段接触的接触区域。已被证明的是，由于所述至少一个转子空隙的椭圆形构造和带动销的与转子空隙相对应的构造，可以减小表面压力，从而相对于现有技术中已知的解决方式(其中，带动销构造为圆柱形并具有圆形的截面)，可以延长转子的寿命。这里表面压力的最小化特别地取决于带动销的特殊的轮廓，该带动销在与转子空隙的接触表面接触的接触区域中具有增大的半径。带动销由于表面压力的减小不再深深嵌入材料中，从而可以延长带动销和/或转子的寿命。
在一种特别有利的实施形式中建议，带动件的各第一轮廓部段具有比两个第二轮廓部段更大的曲率半径，所述第二轮廓部段与转子空隙的两个相对置的局部基本上成半圆形的表面部段相邻。
为了特别是在功率非常强劲的叶片泵中改善转子与电动机轴的连接，在一种特别有利的实施形式中设定，转子具有两个转子空隙并且带动件具有两个与转子空隙相对应的带动销，所述带动销与转子空隙相嵌接。优选可以将两个转子空隙错开180°地在转子内部构造。在该实施形式中带动销也是错开180°地在带动件上构造。
为了简化转子在带动件上的安装，在一种特别有利的实施形式中设定，每个带动销垂直于转子的横向中平面延伸。
在一种特别有利的实施形式中可能的是，每个带动销的横截面关于两条中轴线成镜像对称地构造，所述两条中轴线相交于一个中心点并且互相垂直地定向。
为了简化转子空隙的加工，在一种特别有利的实施形式中设定，每个转子空隙构造成为长孔。
为了简化带动件的安装，在一种特别有利的实施形式中设定，带动件局部地构造为环形的，并且围绕电动机轴延伸。
附图说明
下面将借助附图进一步阐述本发明。附图如下：
图1根据本发明的优选实施例的叶片泵的纵剖面图；
图2叶片泵的沿着图1中D-D线的剖面图；
图3按图1的纵剖面图的局部放大图，它示出实现转矩传递的区域；
图4叶片泵转子的俯视图；
图5图4的放大图。
具体实施方式
按照本发明的优选实施例构造的叶片泵1的基本结构构造以及基本工作原理在现有技术中已知并在下文中将进一步阐述。叶片泵1具有电驱动单元，该电驱动单元安装在叶片泵1的壳体中并具有带电动机轴6的电动机。叶片泵1(叶轮式回转泵)可以特别是构造为用于产生真空的真空泵，该真空泵按照所谓的挤流原理工作。当叶片泵1工作时，通过这里被设计成流体进入接管的流体进入通道15，空气或者其它流体介质被吸入并流入叶片泵1的泵腔2内并在那里被压缩。
泵腔2具有底板4(在电动机侧)、泵环3以及轴向相对于底板4错开的盖板5，它们互相连接。泵环3在这个实施例中具有椭圆形的、具有相应成形的内壁30的内部轮廓(在图3中尤其可以看出)。在一种替代的实施形式中也可能，泵环3构造成圆环形的并且具有圆形的内部轮廓。
在泵腔2的内部设置圆柱形的转子7，该转子与驱动单元的电动机轴6处于作用连接，电动机轴6穿过底板4的中央开孔。转子7在叶片泵1工作时由电动机的电动机轴6驱动并从而进入转动。为了达到这个目的，通过一个相应成形的带动件9使转子7与电动机轴6抗旋转地连接，下文将进一步详细阐述该带动件的结构设计。带动件9本身抗旋转地设置在电动机的电动机轴6上。
转子7具有一定数量的导向槽70，它们分别用于容纳一个滑动件8。在该实施例中，转子7总共具有沿圆周方向分布的八个导向槽70，所述导向槽从转子的外圆周向转子内部延伸。在每个导向槽70中分别可移动地设置一个滑动件8。转子7在叶片泵1工作时由电动机的电动机轴6驱动从而进入转动。如图3可见，滑动件8与其转动位置相关与泵环3的内壁30、转子7的外壁71和可能还有相邻的滑动件8构成了大小不同的工作小腔。
此外叶片泵1具有安装板11，在安装板11上固定这里未详细描述的壳体，电动机安装在该壳体内。替代地，安装板11也可以是该壳体的一部分。此外设置密封圈13，它在安装时设置在安装板11上。密封圈13适合用于对消声罩14进行密封，该消声罩14在末端封闭叶片泵1。消声罩14借助合适的固定螺钉12与安装板11形成螺纹连接。
当叶片泵1工作时，流体通过流体进入通道15并从那里通过安装板11的相应的流体排出口并继而通过两个互相错开180°(并因而彼此相对)布置的流体进入口40流进泵腔2中，所述流体进入口构造在底板4上。转动的转子7的滑动件8压缩流体并驱使其流至两个这里未明确示出的流体排出口，这两个流体排出口优选互相错开180°地设置在泵腔2的盖板5中，并且优选相对于底板4的流体进入口40错开大约90°布置并构造为细长形状的开口。
消声装置10的消声体积在空间上在这里基本上由盖板5的表面和消声罩14所限定，它们包围形成了消声体积。流体在流经泵腔2之后通过盖板5的两个流体排出口流进消声装置10的消声体积中。流体从那里流至流体排出区域19(见图3)并通过这个区域流出叶片泵1。如有必要可以在消声体积内部再安装一个预消声装置。
接下来将继续利用图3至5进一步阐述带动件9的结构设计，该带动件被使用在上述叶片泵1上。如上文已经简要阐述的，转子8借助带动件9与电动机的电动机轴6抗旋转地连接，该电动机轴的自由端部穿过转子7的中央开口。转子7在这个实施例中具有两个互相错开180°布置的转子空隙72，所述转子空隙在此成形为椭圆并构造成长孔。带动件9构造成环形并围绕着电动机轴延伸并与电动机轴6抗旋转地连接。带动件9具有两个与两个转子空隙72相对应的带动销90，这两个带动销同样互相错开180°布置并垂直于转子7的横向中平面延伸。两个带动销90这样成形，使得它们可以嵌入转子7的两个转子空隙72中，并且因此用于将转矩从电动机轴6传递到叶片泵1的转子7上。
对带动件9这样设计，使得可以减小由带动销90引起的在转子3的设计成长孔形的空隙72中的表面压力。这通过使两个带动销90都具有椭圆形的横截面来实现，该横截面与椭圆形转子空隙72的形状相配合，带动销90可以嵌入所述转子空隙中。如同在图5的放大图中可见，两个带动销90的横截面关于两条中轴线成镜像对称，这两条中轴线相交于中点并互相垂直定向。带动销90的外轮廓在这里具有四个具有两个不同的曲率半径R1、R2的轮廓部段91、92、93、94。两个第一轮廓部段91、92紧贴在转子7的构造成长孔形的空隙72的直的表面部段721上、微弱弯曲并具有曲率半径R1，该曲率半径的大小选择成使得能最小化转子空隙72中的表面压力。
两个第二轮廓部段93、94的半径R2＜R1，所述两个第二轮廓部段对置于长孔形空隙72的弯曲的、在横截面上基本上是半圆形的表面部段720且不与表面部段720接触。因此两个第二轮廓部段93、94的弯曲程度比两个第一轮廓部段91、92明显大。即两个第一轮廓部段91、92的曲率半径R1大于两个第二轮廓部段93、94的曲率半径R2。以这种方式设计的第一轮廓部段91、92分别形成带动销90的与构造成长孔的空隙72的直的表面部段721接触的接触区域。已经证明，由于两个第一轮廓部段91、92大的半径R1和微弱的弯曲程度，相比于被设计成圆柱形的具有圆形横截面的带动件，可以大大减小空隙72中的表面压力。带动销90由于表面压力的减小而不再深深地压入材料中，从而可以延长带动销90和/或转子7的寿命。
附图标记列表

Claims (8)

1.叶片泵(1)，其包括电驱动单元、与该电驱动单元相连的泵腔(2)以及转子(7)，电驱动单元包括电动机和电动机轴(6)，转子包括一定数量的滑动件(8)，该转子在泵腔(2)内部与电动机轴(6)同心地布置，电动机轴(6)通过抗旋转地与电动机轴(6)相连的带动件(9)与转子(7)接合并且该带动件(9)具有至少一个带动销(90)，该带动销嵌入与该带动销对应的转子空隙(72)中，其特征在于，所述至少一个转子空隙(72)构造成椭圆形的，并且带动销(90)这样构造轮廓，即两个微弱弯曲的第一轮廓部段(91、92)分别构成一个与转子空隙(72)的各一个长的表面部段(721)接触的接触区域。
2.根据权利要求1的叶片泵(1)，其特征在于，带动件(90)的两个第一轮廓部段(91、92)具有比两个第二轮廓部段(93、94)更大的曲率半径，所述第二轮廓部段与转子空隙(72)的两个彼此相对置的、局部基本上成半圆形的表面部段(720)相邻。
3.根据权利要求1或2的叶片泵(1)，其特征在于，转子(7)具有两个转子空隙(72)，并且带动件(9)具有两个与所述两个转子空隙相对应的带动销(90)，所述带动销与转子空隙(72)相嵌接。
4.根据权利要求3的叶片泵(1)，其特征在于，两个转子空隙(72)错开180°地在转子(7)内部构造。
5.根据权利要求1～4中任一项的叶片泵(1)，其特征在于，每个带动销(90)垂直于转子(7)的横向中平面延伸。
6.根据权利要求1～5中任一项的叶片泵(1)，其特征在于，每个带动销(90)的横截面关于两条中轴线成镜像对称地构造，所述两条中轴线相交于一个中心点并且互相垂直地定向。
7.根据权利要求1～6中任一项的叶片泵(1)，其特征在于，每个转子空隙(72)构造为长孔。
8.根据权利要求1～7中任一项的叶片泵(1)，其特征在于，带动件(9)局部地构造为环形的，并且围绕电动机轴(6)延伸。
CN2010800537064A 2009-11-26 2010-11-25 叶片泵 Pending CN102782327A (zh)

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