Compressor Pumping Assembly Lubrication Network Design
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Solution Overview
Problem
The lubricating oil path in rotary vane compressors fails to meet the lubrication and heat dissipation requirements of the pump body, leading to poor lubrication and potential bearing failure due to inadequate oil distribution and heat dissipation.
Innovation Solution
A pumping assembly with a main shaft passing through multiple structural bodies and a rolling bearing assembly, featuring a network of lubricating oil paths that provide effective lubrication and heat dissipation, including a first lubricating oil path through a sliding sheet backpressure cavity, a second path through a pressure relieving groove, and a third path through the rolling bearing assembly, ensuring stable backpressure and lubrication for friction pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the flange structure is used in rotary vane compressor, then the structural integrity is improved, but the heat dissipation capability deteriorates causing suction gas heating
Solution Approach 1:
The flange structure is divided into multiple sections with heat dissipation fins, transforming a single solid structure into a segmented one that increases surface area for heat dissipation while maintaining structural integrity
Solution Approach 2:
Heat dissipation fins are added to extend the flange structure into a third dimension, increasing the heat dissipation surface area without compromising the base structural integrity of the flange
2Device complexity
If simple oil leakage lubrication is used in bearing raceway, then the device complexity is reduced, but the lubrication effectiveness deteriorates leading to bearing failure
Solution Approach 1:
A dedicated oil supply channel acts as an intermediary to deliver lubricating oil from the pump body cavity to the bearing raceway, ensuring adequate lubrication without requiring complex external lubrication systems
Solution Approach 2:
The lubrication system uses hydraulic flow of lubricating oil through dedicated channels to deliver oil to bearing surfaces, replacing simple leakage-based lubrication with controlled fluid delivery
3Ease of manufacture
If inadequate lubricating oil path is used, then the manufacturing simplicity is improved, but the lubrication requirement fulfillment deteriorates
Solution Approach 1:
The lubricating oil paths serve multiple functions: they provide lubrication to friction pairs, cool the pump body components, and maintain oil pressure distribution, achieving adequate lubrication through a unified path design that doesn't significantly increase manufacturing complexity
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 effectively meets the lubrication and heat dissipation needs of the pump body, providing stable backpressure and improving the reliability and performance of the compressor by ensuring adequate lubrication of all friction pairs.
Implementation Method 1
the lubricating oil paths capable of communicating the first pump body, the rolling bearing assembly, the second pump body and the third pump body are provided respectively, so that the lubrication and heat dissipation requirements of the pump body can be effectively met
Implementation Method 2
heat generated by the movement of a bearing rolling body on a raceway is difficult to dissipate, and poor heat dissipation will result in that suction gas of the compressor is heated
Data Source
Figure 1
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Figure 4~5
AI summary
The present disclosure provides a pumping assembly, a compressor and air conditioning equipment. The pumping assembly includes a first structural body, a rolling bearing assembly, a second structural body, a third structural body and a main shaft, wherein the main shaft sequentially passes through the first structural body, the rolling bearing assembly, the second structural body and the third structural body. The pumping assembly includes a plurality of lubricating oil paths which at least include: a first lubricating oil path, a second lubricating oil path and a third lubricating oil path, wherein the first lubricating oil path passes through a second structural part, a sliding sheet backpressure cavity of a rotor structure of the main shaft, a third structural part, a second structural part and a rolling body of the rolling bearing assembly; the second lubricating oil path passes through the sliding sheet backpressure cavity of the rotor structure of the main shaft and a first pressure relieving groove of the first structural body; and the third lubricating oil path passes through the sliding sheet backpressure cavity of the rotor structure of the main shaft, the first structural part and the rolling body of the rolling bearing assembly. The present disclosure effectively solves the problem in the prior art that the lubricating oil path of the pumping assembly cannot meet the lubricating requirement of the pump body.