Pump Body Oil-Groove Backpressure for Sliding Vane Wear
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Solution Overview
Problem
The friction loss in compressors, particularly due to sliding vanes, is significant, leading to high energy consumption and wear, exacerbated by insufficient oil supply and axial imbalance during high-frequency operation.
Innovation Solution
A pump body assembly with an oil guiding structure that includes a back pressure chamber and oil grooves to enhance lubrication, ensuring balanced axial force and sufficient oil supply to the sliding vane, reducing friction and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surface coating is adopted to strengthen the sliding vane, then wearing resistance is improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent extracts the lubrication function from the sliding vane surface coating and relocates it to the oil groove structure. Instead of coating the sliding vane surface, the design provides dedicated oil supply channels (oil grooves) that deliver lubricating oil directly to the friction surfaces, separating the lubrication function from the structural component.
Solution Approach 2:
The patent introduces lubricating oil as an intermediary substance between the sliding vane and its mating surfaces. The oil groove structure serves as an intermediary delivery system that transports lubricating oil to the friction interfaces, replacing the need for surface coatings with a fluid-mediated lubrication approach.
2Productivity
If compressor operates at high frequency, then productivity is improved, but oil supply to sliding vane decreases causing increased friction loss
Solution Approach 1:
The patent prepares lubricating oil supply in advance by designing oil grooves that are pre-configured to deliver oil to the sliding vane. The oil groove structure ensures that lubricating oil is already positioned and ready to be supplied to the friction surfaces before high-frequency operation begins, preventing oil shortage conditions.
Solution Approach 2:
The patent ensures continuous lubrication by designing oil grooves that maintain constant oil supply to the sliding vane during operation. The groove structure allows lubricating oil to continuously reach the friction surfaces, maintaining effective lubrication even during high-frequency operation when oil discharge rates increase.
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 improves energy efficiency by reducing frictional power consumption and end surface wear of the sliding vane, while eliminating the need for costly coatings, thus enhancing compressor reliability.
Implementation Method 1
a back pressure chamber is formed between the cylinder head and a side of the sliding vane away from the partition plate, and the oil guiding structure is further configured to guide the lubricating oil into the back pressure chamber, so that the back pressure chamber provides a force to move the sliding vane towards the partition plate in relative motion
Implementation Method 2
the oil guiding structure is configured to guide lubricating oil to the oil hole, so that the lubricating oil flows into the first oil groove through the oil hole... ensuring sufficient oil supply to the sliding vane
Data Source
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AI summary
The present application belongs to the technical field of compressors. Provided are a pump body assembly, a compressor, and an air conditioner. The pump body assembly comprises an air cylinder and an oil guide structure. A partition plate covers one side of the air cylinder, and a cylinder cover covers the other side of the air cylinder. The air cylinder has a sliding sheet groove allowing a sliding sheet to be mounted. A first oil groove extending in an axial direction of the air cylinder is disposed in a side wall of the sliding sheet groove. The partition plate is provided with an oil hole thereon, and the oil hole is opposite to the side of the sliding sheet away from the cylinder cover and is in communication with the first oil groove. The oil guide structure is configured to guide a lubricating oil to the oil hole, so that the lubricating oil flows into the first oil groove via the oil hole. A backpressure cavity is formed between the side of the sliding sheet away from the partition plate and the cylinder cover, and the oil guide structure is further configured to guide the lubricating oil into the backpressure cavity, so that the backpressure cavity provides force for the sliding sheet to be relatively close to the partition plate. According to the technical scheme of the present application, by means of the arranged backpressure cavity, backpressure can be provided for the sliding sheet to balance the axial impact of the lubricating oil in the oil hole on the sliding sheet, so that the axial stress of the sliding sheet is more balanced, thereby reducing the end surface abrasion of the sliding sheet.