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Connection shaft and uniaxial eccentric screw pump

A technology for connecting shafts and shafts, used in pumps, pump components, rotary piston pumps, etc., can solve the problems of shape and volume change, pulsation, and poor ejection accuracy, achieving low bending rigidity and improving conveying efficiency. , the effect of high torsional rigidity

Pending Publication Date: 2021-12-10
HEISHIN ENGINEERING & EQUIPMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the posture of the rotor fluctuates in the stator, changing the shape and volume of the cavity, resulting in poor discharge accuracy and pulsation.

Method used

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  • Connection shaft and uniaxial eccentric screw pump
  • Connection shaft and uniaxial eccentric screw pump
  • Connection shaft and uniaxial eccentric screw pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] Hereinafter, the connecting shaft 10 according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0056] The connecting shaft 10 of the present invention is used to connect a first member and a second member in various devices and mechanisms such as various pumps and compressors, and to transmit power of a power source from the first member to the second member. Among other things, the coupling shaft 10 of the present invention is suitable for transmitting eccentric motion from a first part to a second part.

[0057] Such as figure 1 As shown, the coupling shaft 10 of the present invention includes a twisted portion 12 in which a plate-shaped member 11 having a rectangular cross-section 13 is twisted so as to continuously rotate as it advances in the axial direction.

[0058] The cross-sectional shape of the cross-section 13 is a rectangle having a length in the short-side direction and a length in the long-side dir...

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PUM

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Abstract

The purpose of the present invention is to provide a connection shaft having low flexural rigidity and high torsional rigidity. A connection shaft (10) having flexibility and connecting a first member and a second member comprises a twisted part (12) in at least one section thereof, in which cross sections perpendicular to the axial direction of the connection shaft (10) are shaped in a continuously twisting manner toward the axial direction or are shaped in a twisting manner so as to turn in an intermittently stepped shape. Cross-sectional second moments of area at a cross section differ between a first direction (widthwise direction) which is perpendicular to the axial direction and in which the cross-sectional second moment of area at the cross section (13) is minimal, and a second direction (lengthwise direction) perpendicular to the first direction at the same cross section (13).

Description

technical field [0001] The present invention relates to a connecting shaft and a uniaxial eccentric screw pump. More specifically, it relates to a connecting shaft connecting a first member and a second member to transmit power therebetween, and a uniaxial eccentric screw pump using the connecting shaft. Background technique [0002] Conventionally, in order to allow the rotor of a uniaxial eccentric screw pump to rotate eccentrically, a round bar-shaped flexible coupling shaft (equivalent to a flexible drive shaft) is used between the drive side rotating unit and the rotor (for example, Patent Document 1). [0003] In addition, there is known a flexible connection shaft in a shape in which a flat plate-shaped member on which a slit is formed is perpendicular (for example, Patent Document 2). [0004] [Prior Art Literature] [0005] 【Patent Literature】 [0006] Patent Document 1: Japanese Patent Laid-Open No. 2012-154215 [0007] Patent Document 2: Japanese Patent Laid-O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/107
CPCF04C2/107F04C2/1073F04C2240/20F04C2240/10F04C2240/60F05B2240/10F05B2240/20F05B2240/60F05B2210/11
Inventor 榊原教晃森田刚志
Owner HEISHIN ENGINEERING & EQUIPMENT CO LTD
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