Single-screw pump capable of balancing axial force and radial force

Abstract

The invention discloses a single-screw pump capable of balancing axial force and radial force. The single-screw pump comprises a universal shaft, an upper transmission shaft, a stator, a rotor, a lower transmission shaft and axial planetary gear trains, wherein the upper end and the lower end of the rotor are provided with the planetary gear trains, the upper end of the rotor is fixedly connected with a planetary gear of the upper planetary gear train through the upper transmission shaft, and the lower end of the rotor is fixedly connected with a planetary gear of the lower planetary gear train through the lower transmission shaft; the upper end of the upper transmission shaft is connected with the universal shaft. According to the invention, the motion input to the rotor is planetary motion which is the same as the motion of the rotor in motion law; the planetary gears can balance the radial force and upsetting moment which are caused by the rotor, and the universal shaft balances the axial force, so that the stress of the rotor and the stator of the single-screw pump is greatly improved, and the service life is greatly prolonged; because the motion law of the input motion is the same as that of the rotor, the phenomenon of self locking generated by the fact that the frictional angle between the rotor and the stator is oversize is eliminated, so that the value range of design parameters of the single-screw pump is enlarged, and a short lead and a long eccentric distance can be adopted.

Description

technical field [0001] The invention relates to a single screw pump. Background technique [0002] The movement of the rotor in the single screw pump is a planetary movement, that is, rotation and revolution. At present, the single screw pump is connected to the rotor through a cardan shaft or a flexible shaft to drive the rotation of the rotor, and the rotor and the stator mesh to realize both self-rotation and revolution. This transmission mode only inputs the rotation speed of the rotor, and the cardan shaft only balances the axial force of the rotor. The stator in the single screw pump is subjected to forces such as overturning moment, extrusion force, friction force and the like due to the planetary motion of the rotor. The rubber bushing in the rubber bushing single screw pump is easy to be crushed, deformed, worn, and degummed, resulting in serious leakage or failure of the single screw pump, which greatly reduces the service life of the rubber bushing single screw ...

AI Technical Summary

Problems solved by technology

The rubber bushing in the rubber bushing single screw pump is easy to be crushed, deformed, worn, and degummed, resulting in serious leakage or failure of the single screw pump, which greatly reduces the service life of the rubber bushing single screw pump; the rubber bushing in the all metal screw pump The metal stator and metal rotor are squeezed, collided, and worn with each other, resulting in serious leakage or failure of the single-screw pump, which greatly reduces the service life of the all-metal single-screw pump

Since only the rotation speed of the rotor is input, when the parameter design of the screw pump is unreasonable, self-locking will occur when the friction angle between the rotor and the stator is too large, causing the screw pump to fail to work

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