Uniaxial Eccentric Screw Pump Axial Position Adjustment
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Solution Overview
Problem
Conventional uniaxial eccentric screw pumps lack a mechanism for adjusting the relative positional relationship between the stator and the rotor in the axial direction, affecting interference and fluid conveyance efficiency.
Innovation Solution
Incorporating a position adjusting member that allows for the relative axial positioning of the stator with respect to the rotor, enabling adjustable interference and cavity volume control by moving the position adjusting member between the stator and the casing or the end stud, thereby optimizing fluid conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional uniaxial eccentric screw pump is used without a position adjusting member, then the structure is simple, but the relative positional relationship between the stator and rotor in the axial direction cannot be adjusted, affecting interference and fluid conveyance efficiency
Solution Approach 1:
The patent introduces a position adjusting member that enables dynamic adjustment of the axial relative position between the stator and rotor. This member can be positioned at different locations (between stator and casing, or between stator and end stud) to change the axial spacing, allowing the system to adapt to different operational requirements while maintaining a relatively simple overall structure.
2Reliability
If the rotor and stator wear over time, then the interference between them decreases, but fluid conveyance stability deteriorates
Solution Approach 1:
The position adjusting member allows operators to change the axial relative position parameter between the rotor and stator. When wear occurs and interference decreases, the adjusting member can be repositioned to reduce the axial gap, thereby restoring the original interference level and conveying stability without replacing the worn components, thus extending their service life.
3Reliability
If environmental conditions such as temperature and fluid viscosity change, then the interference characteristics change, but fluid conveyance efficiency deteriorates
Solution Approach 1:
The position adjusting member provides a mechanism to change the axial spacing parameter in response to environmental changes. When temperature or fluid viscosity changes affect the interference characteristics, the adjusting member can be repositioned to compensate for these changes and maintain optimal conveyance efficiency, making the system adaptable to varying environmental conditions.
Data Source
AI summary
A uniaxial eccentric screw pump includes: a rotor 1 including a shaft body of a male screw type; a stator 2 having a through hole 2a of a female screw type through which the rotor 1 is inserted; a casing 3 connected to one end side of the stator 2; an end stud 4 connected, to the other end side of the stator 2; and a position adjusting member 5 that adjusts a relative position of the stator 2 with respect to the rotor 1 in an axial direction.