Compressor pump structure and compressor
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Solution Overview
Problem
Current rotating-cylinder compressors face issues such as circumferential leaking channels, high processing costs, complex piston and piston bush structures, large deformation and contact stress, and significant frictional power loss due to sliding friction between the cylinder and piston bush.
Innovation Solution
A compressor pump structure featuring a cylinder sleeve with a volume-variable chamber, a piston that slides within the cylinder, and a rotating shaft with an eccentric axis, replacing the piston bush and incorporating rolling pin retainers to convert sliding friction to rolling friction, thereby reducing leaks and processing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piston bush is mounted coaxially with a cylinder to support the piston, then the piston can be supported during operation, but a circumferential leaking channel is formed between the piston bush and cylinder, resulting in lowered compressor performance
Solution Approach 1:
The invention removes the piston bush component entirely from the system. Instead of using a piston bush mounted coaxially with the cylinder, the patent employs a piston directly engaged with the cylinder through glide planes, eliminating the source of the circumferential leaking channel while maintaining piston support functionality
Solution Approach 2:
Rather than supporting the piston radially from the outside through a piston bush, the invention inverts the support mechanism by having the piston supported through glide planes formed directly on the piston and cylinder surfaces, changing the direction and location of the support contact
2Ease of manufacture
If the piston bush is radially spaced during assembly and supported by a short shaft cantilever, then the piston can be assembled, but the span of the piston supporting portion of the rotating shaft becomes large, resulting in large deformation and contact stress
Solution Approach 1:
The invention eliminates the short shaft cantilever support structure by removing the piston bush entirely. The piston is now supported directly through glide planes on the piston and cylinder surfaces, eliminating the need for radial spacing and cantilever support, thereby reducing the span and improving shaft strength
Solution Approach 2:
The glide planes act as an intermediary support mechanism between the piston and cylinder, replacing the short shaft cantilever. This intermediary structure provides direct support contact that reduces the span and deformation of the rotating shaft while maintaining assembly feasibility
3Productivity
If both intake and exhaust passages are distributed on a wall of the cylinder, then gas flow paths are established, but the cylinder becomes difficult to process and processing cost increases
Solution Approach 1:
The invention merges the intake and exhaust passages into the flange structure rather than distributing them on the cylinder wall. The flange serves as a integrated manifold for both passages, simplifying cylinder processing while maintaining gas flow capability through the combined flange structure
Solution Approach 2:
The invention relocates the passages from the cylindrical surface (one dimension) to the flange structure (another dimension). By moving the passages to the flange, the cylinder wall remains simple and easy to process, while the flange provides the necessary gas flow paths in a different spatial location
4Stability of the object's composition
If the piston and piston bush have complex arc surfaces and parallel surfaces for matching, then the piston can be prevented from self-rotation, but the structure becomes complex and processing cost increases
Solution Approach 1:
The invention removes the piston bush and its complex matched arc surfaces. Instead, the piston is prevented from self-rotation through glide planes formed directly on the piston and cylinder surfaces, which are simpler to manufacture and process while maintaining the anti-self-rotation function
Solution Approach 2:
The invention changes the geometric parameters of the piston structure by replacing complex arc surfaces with simpler glide plane surfaces. The glide planes provide the necessary constraint against self-rotation through their planar geometry and orientation, reducing structural complexity while maintaining functional stability
5Reliability
If a circumferential friction pair between the cylinder and piston bush is used as a sliding friction pair, then the piston can be supported, but the linear velocity and area of the friction pair are very large, resulting in large frictional power loss
Solution Approach 1:
The invention removes the piston bush that created the large circumferential sliding friction pair. The piston is now supported through glide planes with significantly reduced frictional contact, eliminating the source of large frictional power loss while maintaining piston support reliability
Solution Approach 2:
The invention substitutes the sliding friction mechanism with a glide plane mechanism that reduces friction. By replacing the circumferential sliding contact with planar glide contact, the mechanical interaction changes from high-friction sliding to lower-friction gliding, reducing energy loss
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 design eliminates circumferential leaking channels, reduces processing costs, and significantly improves compressor performance by minimizing mechanical power loss and enhancing operational efficiency.
Implementation Method 1
a rotating shaft passes through the piston, the axis of the rotating shaft being eccentrically disposed with respect to the axis of the cylinder with a fixed eccentricity; the rotating shaft is configured to drive the piston and the cylinder to rotate; and the piston is configured to slide within the cylinder while rotating
Implementation Method 2
incorporating rolling pin retainers to convert sliding friction to rolling friction, thereby reducing leaks and processing complexity
Data Source
AI summary
A compressor pump structure has a cylinder sleeve provided between an upper flange and a lower flange; a cylinder is provided inside the cylinder sleeve; a piston is slidably arranged inside the cylinder; a volume-variable chamber is formed among the cylinder sleeve, the cylinder and the piston; a rotating shaft passes through the piston, the axis of the rotating shaft being eccentrically disposed with respect to the axis of the cylinder with a fixed eccentricity; the rotating shaft drives the piston and the cylinder to rotate; and the piston slides within the cylinder while rotating so as to change the volume of the volume-variable chamber. Further disclosed is a compressor which comprises a compressor pump structure.