WO2019109860A1 - 加速离心泵的离心叶轮 - Google Patents

加速离心泵的离心叶轮 Download PDF

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Publication number
WO2019109860A1
WO2019109860A1 PCT/CN2018/118413 CN2018118413W WO2019109860A1 WO 2019109860 A1 WO2019109860 A1 WO 2019109860A1 CN 2018118413 W CN2018118413 W CN 2018118413W WO 2019109860 A1 WO2019109860 A1 WO 2019109860A1
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centrifugal
impeller
blade
center
front cover
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PCT/CN2018/118413
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English (en)
French (fr)
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张颖
董国兴
杜丽红
高利飞
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张颖
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Publication of WO2019109860A1 publication Critical patent/WO2019109860A1/zh

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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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes

Definitions

  • the present invention relates to a centrifugal pump, and more particularly to a centrifugal impeller for accelerating a centrifugal pump.
  • the centrifugal impeller is the core component of the centrifugal water pump.
  • the rotary power input by the pump shaft drives the centrifugal impeller to rotate, so that the liquid in the impeller chamber flows to the edge of the centrifugal impeller under the action of centrifugal force, and then exits to the volute water channel cavity and exits. Flow out.
  • each centrifugal blade on the centrifugal impeller 11 has a circular curved surface, and several centrifugal blades are evenly distributed at the center of the centrifugal impeller.
  • the concave direction of the curved surface of each centrifugal blade is opposite to the rotational direction of the centrifugal impeller 11, that is, if the centrifugal impeller 11 is rotated counterclockwise, the circular curved surface of each centrifugal blade on the impeller
  • the convex direction is also arranged counterclockwise.
  • the main object of the present invention is to provide a centrifugal impeller for accelerating a centrifugal pump.
  • the concave surface of the circular curved surface of the centrifugal blade is the same as the centrifugal impeller, and the front cover of the impeller is provided with a water ring, not only The sealing of the vortex channel is improved, and the flow rate is increased at the same power and speed, and the working head is increased.
  • a centrifugal impeller for accelerating a centrifugal pump comprising an impeller front cover, an impeller back cover and a plurality of centrifugal blades, the leading edge of the plurality of centrifugal blades being the center of the impeller front cover
  • the center of the impeller is evenly arranged on the rear of the impeller front cover.
  • the front edge of the impeller front cover is provided with a water inlet.
  • the rear edges of the plurality of centrifugal blades are respectively connected with the front surface of the impeller back cover, and also include several water ring rafts, and several centrifugal blades are
  • the circular arc surface of the same width has the concave surface of the curved surface of each centrifugal blade facing the same direction as the rotation direction of the centrifugal impeller, and several water loops are uniformly distributed on the front surface of the front cover of the impeller.
  • the arc curved surface of the centrifugal blade is composed of a blade center curved surface, a blade outer edge inclined surface, and a blade inner edge inclined surface.
  • the center surface of the blade is curved.
  • the vertical distance between the horizontal line of the center point of the central surface of the blade and the center of the centrifugal impeller is D, and the distance dimension of the D is 3/6-4/6 of the radius R of the centrifugal impeller, and the central surface of the blade The radius r is 1/4.
  • the blade outer edge slope of the curved surface of the centrifugal blade is inclined forward by 110° to 130° along the rotation direction of the centrifugal impeller, and the blade inner edge slope of the circular curved surface of the centrifugal blade is along the centrifugal impeller
  • the direction of rotation is inclined backward by 25° to 35° and is tangent to the inner circumference of the water inlet of the impeller front cover.
  • the thickness f of the impeller front cover and the impeller rear cover is 6 to 12 mm.
  • the thickness of the centrifugal blade is 1/2 of the thickness f of the impeller front cover and the impeller rear cover.
  • the width e of the water ring disposed on the front cover of the impeller is the same as the thickness of the centrifugal blade.
  • the beneficial effect after adopting the above technical solution is: a centrifugal impeller for accelerating the centrifugal pump.
  • the concave surface of the circular curved surface of the centrifugal blade is the same as the centrifugal impeller, and the front cover of the impeller is provided with a water ring, which not only improves The sealing of the vortex channel is improved, and the flow rate is increased at the same power and speed, and the working head is increased.
  • FIG. 1 is a schematic view showing the operation of a centrifugal blade in the prior art and the present invention.
  • Figure 2 is a schematic perspective view of the present invention.
  • Figure 3 is a schematic view of the structure of the present invention.
  • Figure 4 is a schematic view showing the structure of a centrifugal blade in the present invention.
  • the centrifugal impeller of the accelerated centrifugal pump comprises an impeller front cover 1, an impeller rear cover 2 and a plurality of centrifugal blades 3, and the leading edge of the plurality of centrifugal blades 3 is an impeller front cover 1
  • the center is uniformly disposed on the rear surface of the impeller front cover 1.
  • the water inlet 4 is disposed in the middle of the impeller front cover 1.
  • the rear edges of the plurality of centrifugal blades 3 are respectively connected to the front surface of the impeller rear cover 2, and also include several water rings.
  • the plurality of centrifugal blades 3 are circular arc surfaces of equal width, the concave surface of the circular curved surface of each centrifugal blade 3 is oriented in the same direction as the rotation direction of the centrifugal impeller 11, and a plurality of water ring ⁇ 5 are evenly distributed on the front cover 1 of the impeller On the front.
  • the arcuate curved surface of the centrifugal blade 3 is composed of a blade center curved surface 6, a blade outer edge inclined surface 7 and a blade inner edge inclined surface 8, when a point on the blade center curved surface 6 is located at a center vertical line of the centrifugal impeller 9
  • the center line horizontal line 10 of the blade center surface intersects the vertical line 9 of the centrifugal impeller
  • the vertical distance between the center line horizontal line 10 of the blade center surface and the center of the centrifugal impeller 11 is D
  • the distance dimension of the D is the radius of the centrifugal impeller R /6
  • the blade center surface radius r is 1/4.
  • the blade outer edge inclined surface 7 of the circular curved surface of the centrifugal blade 3 is inclined forward by 120° in the rotating direction of the centrifugal impeller 11, and the blade inner edge inclined surface 8 of the circular curved surface of the centrifugal blade 3 is along The direction of rotation of the centrifugal impeller 11 is inclined backward by 30° and is tangent to the inner circle of the water inlet 4 of the impeller front cover 1.
  • the thickness f of the impeller front cover 1 and the impeller rear cover 2 is 6 to 12 mm.
  • the thickness of the centrifugal blade 3 is 1/2 of the thickness f of the impeller front cover 1 and the impeller rear cover 2.
  • the width e of the water ring 5 provided on the impeller front cover 1 is the same as the thickness of the centrifugal blade 11.
  • each centrifugal blade 3 on the centrifugal impeller 11 is a circular curved surface.
  • the plurality of centrifugal blades 3 are uniformly distributed in the center of the centrifugal impeller 11, and the concave direction of the circular curved surface of each centrifugal blade 3 is the same as the rotational direction of the centrifugal impeller 11, that is, if the centrifugal impeller 11 is rotated counterclockwise, the centrifugal impeller
  • the concave direction of the curved surface of each of the centrifugal blades 3 is also arranged counterclockwise.
  • the centrifugal vane 3 moves from the inside to the outside.
  • the arc of the centrifugal impeller 11 is equal to the path of the water droplets 12 flowing through the centrifugal vane 3
  • the water droplets 12 pass through the vane inner edge bevel 8 and the vane center curved surface 6, and the water flow point 12 undergoes slow acceleration.
  • the 120° slope of the blade outer edge slope 7 is entered, and the tangential direction of the blade center curved surface 6 is accelerated and thrown forward.
  • the technical solution of the present invention is different from the prior art in that the phase angles at the edges of the two centrifugal blades 3 are different by 60°. From the analysis of the two centrifugal impellers 11, the water flow is moved when the two centrifugal impellers 11 are turned the same. The 60° arc length difference is generated, and the water flow is accelerated into the worm line water channel. At the same speed, the water flow speed is improved, thereby effectively improving the lift of the centrifugal pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

加速离心泵的离心叶轮（11）包括叶轮前盖（1）、叶轮后盖（2）和数个离心叶片（3），数个离心叶片（3）的前缘以叶轮前盖中心为圆心均匀设置在叶轮前盖（1）的后面上，叶轮前盖（1）中间设置有入水口（4），数个离心叶片（3）的后缘分别与叶轮后盖（2）的前面相连，还包括数个水环楞（5），数个离心叶片（3）为等宽的圆弧曲面，每个离心叶片（3）的圆弧曲面的凹面朝向与离心叶轮（11）的转动方向相同，数个水环楞（5）均匀分布在叶轮前盖（1）的前面上；其中离心叶片（3）的圆弧曲面的凹面方向与离心叶轮（11）转向相同，叶轮前盖（1）设有水环楞（5），不但提高了蜗线腔水道的密封性，并且在同等功率和转速下提高了流速，加大了工作扬程。

Description

加速离心泵的离心叶轮 技术领域
本发明涉及一种离心泵，特别是涉及一种加速离心泵的离心叶轮。
背景技术
离心叶轮是离心式水泵的核心部件，经泵轴输入的旋转动力驱动离心叶轮旋转，使叶轮腔内的液体在离心力的作用下，流向离心叶轮的边缘，甩向蜗状水道腔后，经出口流出。
如图1所示，在现有技术A中，离心泵的离心叶轮11，在径向剖面看，离心叶轮11上的每个离心叶片为圆弧曲面，数个离心叶片以离心叶轮中心均匀分布设置在离心叶轮11上，每个离心叶片的圆弧曲面的凹面方向是与离心叶轮11的转动方向相反的，即如果离心叶轮11是逆时针旋转时，叶轮上每个离心叶片的圆弧曲面的凸面方向也是逆时针方向排列的，当离心叶轮11旋转后，离心叶轮11上的离心叶片圆弧曲面凸面上的水滴质点12受离心压力作用沿离心叶片由内向外移动，当离心叶轮11转过的弧度等于水滴质点12流过叶片的路程时，水滴质点12脱离离心叶片流出离心叶轮11边缘的水流速度会因为离心叶片圆弧曲面的后掠而降低水流速度，因水流速度与水泵的扬程成正比，在采用现有技术的离心式水泵的扬程会因此而受到影响。
技术问题
有鉴于此，本发明的主要目的在于提供一种加速离心泵的离心叶轮，通过本技术方案，离心叶片的圆弧曲面的凹面方向与离心叶轮转向相同，叶轮前盖设有水环楞，不但提高了蜗线腔水道的密封性，并且在同等功率和转速下提高了流速，加大了工作扬程。
技术解决方案
为了达到上述目的，本发明的技术方案是这样实现的：一种加速离心泵的离心叶轮，包括叶轮前盖、叶轮后盖和数个离心叶片，数个离心叶片的前缘以叶轮前盖中心为圆心均匀设置在叶轮前盖的后面上，叶轮前盖中间设置有入水口，数个离心叶片的后缘分别与叶轮后盖的前面相连，还包括数个水环楞，数个离心叶片为等宽的圆弧曲面，每个离心叶片的圆弧曲面的凹面朝向与离心叶轮的转动方 向相同，数个水环楞均匀分布在叶轮前盖的前面上。
作为进一步的技术方案，所述离心叶片的圆弧曲面由叶片中心曲面、叶片外缘斜面和叶片内缘斜面构成，当所述叶片中心曲面上一点位于离心叶轮中心垂直线上，叶片中心曲面中心点水平线与离心叶轮中心垂直线相交时，叶片中心曲面中心点水平线与离心叶轮中心的垂直距离为D，所述D的距离尺寸为离心叶轮半径R的3/6-4/6，叶片中心曲面半径r为1/4。
作为进一步的技术方案，所述离心叶片中圆弧曲面的叶片外缘斜面沿离心叶轮的转动方向向前倾斜110°～130°，所述离心叶片中圆弧曲面的叶片内缘斜面沿离心叶轮的转动方向向后倾斜25°～35°，并且与叶轮前盖的入水口内圆相切。
作为进一步的技术方案，所述叶轮前盖和叶轮后盖的厚度f为6～12mm。
作为进一步的技术方案，所述离心叶片的厚度为叶轮前盖和叶轮后盖厚度f的1/2。
作为进一步的技术方案，设置在叶轮前盖上的水环楞的宽度e与离心叶片的厚度相同。
有益效果
采用上述技术方案后的有益效果是：一种加速离心泵的离心叶轮，通过本技术方案，离心叶片的圆弧曲面的凹面方向与离心叶轮转向相同，叶轮前盖设有水环楞，不但提高了蜗线腔水道的密封性，并且在同等功率和转速下提高了流速，加大了工作扬程。
附图说明
图1为现有技术与本发明中离心叶片的工作原理图。
图2为本发明的立体结构示意图。
图3为本发明的结构示意图。
图4为本发明中离心叶片的结构示意图。
图中，1叶轮前盖、2叶轮后盖、3离心叶片、4入水口、5水环楞、6叶片中心曲面、7叶片外缘斜面、8叶片内缘斜面、9离心叶轮中心垂直线、10叶片中心曲面中心点水平线、11离心叶轮、12水滴质点、A现有技术、B本技术方案。
本发明的实施方式
下面将结合附图对本发明中具体实施例作进一步详细说明。
如图2-图4所示，本发明涉及的加速离心泵的离心叶轮，包括叶轮前盖1、叶轮后盖2和数个离心叶片3，数个离心叶片3的前缘以叶轮前盖1中心为圆心均匀设置在叶轮前盖1的后面上，叶轮前盖1中间设置有入水口4，数个离心叶片3的后缘分别与叶轮后盖2的前面相连，还包括数个水环楞5，数个离心叶片3为等宽的圆弧曲面，每个离心叶片3的圆弧曲面的凹面朝向与离心叶轮11的转动方向相同，数个水环楞5均匀分布在叶轮前盖1的前面上。
作为进一步的实施例，所述离心叶片3的圆弧曲面由叶片中心曲面6、叶片外缘斜面7和叶片内缘斜面8构成，当所述叶片中心曲面6上一点位于离心叶轮中心垂直线9上，叶片中心曲面中心点水平线10与离心叶轮中心垂直线9相交时，叶片中心曲面中心点水平线10与离心叶轮11中心的垂直距离为D，所述D的距离尺寸为离心叶轮半径R的3/6，叶片中心曲面半径r为1/4。
作为进一步的实施例，所述离心叶片3中圆弧曲面的叶片外缘斜面7沿离心叶轮11的转动方向向前倾斜120°，所述离心叶片3中圆弧曲面的叶片内缘斜面8沿离心叶轮11的转动方向向后倾斜30°，并且与叶轮前盖1的入水口4内圆相切。
作为进一步的实施例，所述叶轮前盖1和叶轮后盖2的厚度f为6～12mm。
作为进一步的实施例，所述离心叶片3的厚度为叶轮前盖1和叶轮后盖2厚度f的1/2。
作为进一步的实施例，设置在叶轮前盖1上的水环楞5的宽度e与离心叶片11的厚度相同。
本发明的离心叶片3工作原理，如附图1所示，本技术方案B中，离心泵的离心叶轮11，在径向剖面看，离心叶轮11上的每个离心叶片3为圆弧曲面，数个离心叶片3以离心叶轮11中心均匀分布设置，每个离心叶片3的圆弧曲面的凹面方向是与离心叶轮11的转动方向相同的，即如果离心叶轮11是逆时针旋转时，离心叶轮11上每个离心叶片3的圆弧曲面的凹面方向也是逆时针方向排列的，当离心叶轮11旋转后，离心叶轮11上的离心叶片3圆弧曲面凹面上的水滴质点12受离心压力作用沿离心叶片3由内向外移动，当离心叶轮11转过的弧度等于水滴质点12流过离心叶片3的路程时，水滴质点12经过叶片内缘斜面8 和叶片中心曲面6，水流质点12经过慢加速和离心作用后，进入叶片外缘斜面7的120°斜面，沿叶片中心曲面6的切线方向向前加速抛出。
本发明的技术方案与现有技术相比，两个离心叶片3边缘处的相位角相差60°，从两个离心叶轮11的分析上，在两个离心叶轮11转向相同的情况下，水流移动产生60°弧长路程差，水流加速进入蜗线腔水道，在同转速的情况下，水流速度得到了提升，从而有效的提高了离心泵的扬程。
以上所述，仅为本发明的较佳可行实施例而已，并非用以限定本发明的保护范围。

Claims (6)

  1. 一种加速离心泵的离心叶轮，包括叶轮前盖、叶轮后盖和数个离心叶片，数个离心叶片的前缘以叶轮前盖中心为圆心均匀设置在叶轮前盖的后面上，叶轮前盖中间设置有入水口，数个离心叶片的后缘分别与叶轮后盖的前面相连，其中，包括数个水环楞，数个离心叶片为等宽的圆弧曲面，每个离心叶片的圆弧曲面的凹面朝向与离心叶轮的转动方向相同，数个水环楞均匀分布在叶轮前盖的前面上。
  2. 根据权利要求1所述的加速离心泵的离心叶轮，其中，所述离心叶片的圆弧曲面由叶片中心曲面、叶片外缘斜面和叶片内缘斜面构成，当所述叶片中心曲面上一点位于离心叶轮中心垂直线上，叶片中心曲面中心点水平线与离心叶轮中心垂直线相交时，叶片中心曲面中心点水平线与离心叶轮中心的垂直距离为D，所述D的距离尺寸为离心叶轮半径R的3/6-4/6，叶片中心曲面半径r为1/4。
  3. 根据权利要求2所述的加速离心泵的离心叶轮，其中，所述离心叶片中圆弧曲面的叶片外缘斜面沿离心叶轮的转动方向向前倾斜110°～130°，所述离心叶片中圆弧曲面的叶片内缘斜面沿离心叶轮的转动方向向后倾斜25°～35°，并且与叶轮前盖的入水口内圆相切。
  4. 根据权利要求1所述的加速离心泵的离心叶轮，其中，所述叶轮前盖和叶轮后盖的厚度f为6～12mm。
  5. 根据权利要求2所述的加速离心泵的离心叶轮，其中，所述离心叶片的厚度为叶轮前盖和叶轮后盖厚度f的1/2。
  6. 根据权利要求1所述的加速离心泵的离心叶轮，其中，设置在叶轮前盖上的水环楞的宽度e与离心叶片的厚度相同。
PCT/CN2018/118413 2017-12-08 2018-11-30 加速离心泵的离心叶轮 WO2019109860A1 (zh)

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Cited By (1)

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TWI785970B (zh) * 2022-01-21 2022-12-01 沅任科技股份有限公司 旋風式循環風扇

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