Internal-Meshing Gear Pump for Horizontal Compressor Lubrication
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Solution Overview
Problem
Existing oil pumping mechanisms for horizontal compressors are complex, costly, and often fail to provide sufficient lubrication, especially under variable-speed conditions, making them inconvenient and unreliable.
Innovation Solution
A fluid pumping device with a pump structure comprising two cooperating pump members and a housing structure that defines sealed pockets, allowing for multiple suction and discharge paths to ensure efficient lubrication, featuring adjustable partition assemblies for customizable suction and discharge volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single oil pumping mechanism is used to pump lubricating oil from the oil reservoir to the rotating shaft, then the structure is simplified, but under variable-speed conditions the pump cannot provide sufficient lubricating oil, reducing reliability
Solution Approach 1:
The single oil pumping mechanism is divided into two independent pump mechanisms: a first pump mechanism for pumping oil from the oil reservoir to the rotating shaft, and a second pump mechanism for pumping oil from the motor region to the rotating shaft. This segmentation allows each pump to operate independently, ensuring sufficient lubrication under variable-speed conditions while maintaining reasonable structural complexity
Solution Approach 2:
The pump housing structure serves multiple functions: it houses both the first and second pump mechanisms, provides sealed pockets for both pumps, and integrates the oil supply passages. This multi-functionality reduces overall device complexity while enabling reliable multi-path oil supply
2Reliability
If a specialized double-layer housing structure is used to form an oil sump, then lubricating oil can be provided, but the structure becomes complicated and costs increase
Solution Approach 1:
The pump housing structure merges the housing functions with the oil sump function. Instead of using a separate double-layer housing structure, the patent integrates the oil reservoir and motor region within a single housing that also contains both pump mechanisms, simplifying the overall structure while ensuring reliable lubrication provision
Solution Approach 2:
The housing structure performs multiple functions simultaneously: it serves as the container for the compression mechanism, the oil reservoir, the motor region, and houses both pump mechanisms. This multi-functionality eliminates the need for specialized double-layer housing structures while maintaining reliable lubrication
3Reliability
If the pump structure rotates with defined suction and compression pockets, then fluid can be pumped through sealed paths, but the manufacturing precision requirements increase
Solution Approach 1:
The pump members utilize their own rotational motion and the pressure differential between suction and compression pockets to maintain sealing. The rotation of the pump members automatically opens and closes the suction and discharge ports in sequence, eliminating the need for complex external sealing mechanisms and reducing manufacturing precision requirements
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
The solution simplifies the structure, reduces costs, and enhances the reliability and stability of the compressor by providing sufficient lubrication, improving the operational efficiency and flexibility of the fluid pumping device.
Implementation Method 1
the at least two suction paths are configured such that the fluid outside the fluid pumping device can be sucked into the suction pocket through the at least two suction paths as the pump structure rotates, and the at least two discharge paths are configured such that the compressed fluid in the compression pocket can be discharged from the fluid pumping device via the at least two discharge paths
Data Source
AI summary
Disclosed are a fluid pumping device and a horizontal compressor. The fluid pumping device comprises a pump structure in the form of an internal-meshing gear pump and is provided with first and second pump members, a pump housing structure for accommodating the pump structure, and at least two suction paths and/or at least two discharge paths. Suction and compression cavities are defined between the first and second pump members; the at least two suction paths are configured to rotate with the pump structure, and a fluid can be sucked into the suction cavity via the at least two suction paths respectively; and the at least two discharge paths are configured to rotate with the pump structure, and the compressed fluid can be discharged from the fluid pumping device via the discharge paths respectively. The fluid pumping device is assembled in the horizontal compressor.