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Uni-axial screw pump

A screw pump, single-shaft technology, applied in the field of motors with large output, can solve the problems of complex manufacturing process and heavy weight, and achieve the effect of small vibration and noise

Inactive Publication Date: 2009-03-11
田广惠 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the manufacturing process of these open screw pumps is still complicated and they are heavier because the axial movement of the fluid must be achieved by a power unit including a pair of synchronous gears

Method used

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Examples

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Embodiment Construction

[0037] Referring now to Figure 1, there is shown a screw pump 1 made in accordance with the invention comprising an outer cylindrical housing 2 having an inlet end 1a and a discharge end 1b.

[0038] The threaded rotor 3 is a molded or welded component that is directly connected to the motor 4 and is rotatably mounted inside said outer casing 2 .

[0039]The threads 5 extending on the threaded rotor 3 are broken at pitch intervals to form as many thread portions 5 as there are pitches. The threaded shaft 6 is not broken, and as a result, when the rotor 3 rotates, a plurality of annular spaces are formed between said broken threaded portions 5 .

[0040] A plurality of annular restraints 7 fitted in said annular space are inserted therein. When the screw rotor 3 rotates, said means 7 restrain the conveyed fluid from moving in a direction around the axis 6 and force the fluid to move axially towards the discharge end 1b. An annular restraint 7 is arranged at the beginning of t...

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Abstract

The present invention describes a uni-axial screw pump (1) to convey various viscous fluids with high pump efficiency wherein restraining devices restrain the fluid' s tendency to rotate around the axis (6) as the rotor (3) rotates. As a result all the fluid trapped between the helical thread (5) and inner surface of inner cylindrical casing (10) is forced in the axial direction towards the discharge end. It is simple in structure and small in external dimension. It can also be employed as hydraulic turbine, thermo motor, liquid motor, extruder, molder and etc. The said screw pump is characterized in that the thread (5) of the screw rotor (3) is disconnected perpendicularly to the axis to make a plurality of thread sections, a plurality of annular restraining devices (7) being inserted in the annular gaps formed between said disconnected thread sections (5), the said annular restraining devices (7) having restraining elements (9) and openings (8) for the fluid to be conveyed through, inner cylindrical sections (10) being axially disposed between the said inserted annular restraining devices (7) to enclose the screw rotor (3).

Description

technical field [0001] The present invention relates to a single-shaft screw pump for conveying various liquids with different viscosities with high pumping efficiency, and also relates to a motor with a large output. Background technique [0002] In 300 BC, the ancient Greek scientist Archimedes invented the so-called "screw pump" for pumping water using bamboo, which has helical blades mounted to a shaft that rotates inside a cylindrical hollow bamboo rod . [0003] Compared with other types of screw pumps, there is one type of screw pump that has attracted attention as a promising pump because of its simple structure, mechanically strong rotor, and wide range of flow and compression operating capabilities. [0004] Screw pumps whose inlet and discharge ends are defined by sealed lines are called hermetic screw pumps. A screw pump without such a sealed line is called an open screw pump. Depending on the number of shafts carrying the threaded rotor, enclosed screw pumps ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B19/12F04C18/107
CPCF04B19/12
Inventor 田广惠朴杰田亨厚田广煜金胜元
Owner 田广惠
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