Gear Pump Symmetrical Chamber Pressure Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional internal gear pumps experience unbalanced pressure between intake and discharge areas, leading to increased sliding resistance and reduced machine efficiency due to the internal gear being pressed against the housing, requiring extra driving force.
Innovation Solution
The design incorporates a partitioning portion between two external gears to divide the pump chamber into symmetrical intake and discharge spaces, balancing pressure and reducing frictional torque loss by allowing fluid to flow through multiple tooth spaces, thereby aligning the internal gear and housing axes appropriately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional internal gear pump uses a single pump chamber, then the structure is simple, but the pressure becomes unbalanced between intake and discharge areas, increasing sliding resistance and reducing machine efficiency
Solution Approach 1:
The single pump chamber is segmented into two separate pump chambers (first pump chamber and second pump chamber) by the partitioning portion. Each chamber has its own intake space and discharge space arranged symmetrically, which balances the pressure distribution and reduces sliding resistance while maintaining structural simplicity
Solution Approach 2:
The partitioning portion is positioned asymmetrically relative to the gear rotation, creating symmetrical intake and discharge spaces on opposite sides of the internal gear. This asymmetric arrangement of the partition enables balanced pressure distribution across the gear, reducing unbalanced radial forces and improving machine efficiency
2Reliability
If the internal gear is pressed against the housing to maintain sealing, then sealing performance improves, but sliding resistance increases and extra driving force is required
Solution Approach 1:
The symmetrical arrangement of intake and discharge spaces creates equipotential pressure distribution on both sides of the internal gear. The partitioning portion ensures that pressure forces are balanced, allowing the gear to float at an optimal position that maintains sealing without excessive contact pressure, thereby reducing sliding resistance and required driving force
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration balances pressure within the internal gear, reducing sliding friction and enhancing machine efficiency by providing two oil sending routes between intake and discharge spaces, allowing for efficient fluid transfer and lower driving force requirements.
Implementation Method 1
an internal gear (outer rotor) formed to have an annular shape and have internal teeth; an external gear (inner rotor), having external teeth that can mesh with the internal teeth
Implementation Method 2
A plurality of meshing gaps (pump chambers) are defined between tooth surfaces of the internal gear and the external gear along a rotation direction of the internal gear. Each pump chamber rotationally moves in accordance with rotation of the internal gear and the external gear
Implementation Method 3
The first intake space and the second intake space are provided to be symmetrical about a rotational center of the internal gear, and the first discharge space and the second discharge space are provided to be symmetrical about the rotational center of the internal gear
Implementation Method 4
The partitioning portion preferably comprises: a first circumference surface that comes into slidable contact with the external teeth of the first external gear; a second circumference surface that comes into slidable contact with the external teeth of the second external gear
Data Source
AI summary
A gear pump according to the present invention is configured such that a first pump chamber comprises a first intake space into which a fluid is taken in and a first discharge space from which the fluid is discharged, in accordance with rotation of an internal gear and external gears, a second pump chamber comprises a second intake space into which the fluid is taken in and a second discharge space from which the fluid is discharged, in accordance with rotation of the internal gear and the external gears, the first intake space and the second intake space are provided to be symmetrical about a rotational center of the internal gear, and the first discharge space and the second discharge space are provided to be symmetrical about the rotational center of the internal gear.