Scroll Compressor Lubrication via Boss Plate Passage
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Solution Overview
Problem
The scroll-type fluid machine described in Patent Literature 1 faces challenges in supplying grease to necessary parts during maintenance, requiring the removal of a fixed scroll and complicating the operation, thereby affecting workability and reliability.
Innovation Solution
The implementation of a scroll-type fluid machine with a lubricant supply passage and grease nipple that allows grease to be supplied to the orbiting bearing and auxiliary crank bearing without removing the fixed scroll, enabling efficient lubrication during maintenance by directing the grease nipple to face an opening part even when the fixed scroll is attached, and providing guides and protrusions for improved accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the oil supply hole faces the front side in the direction of the axis line of the eccentric shaft, then the structure is simple and manufacturing is easy, but grease cannot be supplied without removing the fixed scroll, reducing maintenance workability
Solution Approach 1:
The patent changes the orientation of the oil supply hole from the front side (axial direction) to the back side of the orbiting scroll, utilizing a different spatial dimension. This allows the grease supply path to extend through the orbiting scroll to the front side, enabling grease access while the fixed scroll remains installed, thus resolving the contradiction between manufacturing simplicity and maintenance accessibility.
2Reliability
If the fixed scroll is removed to supply grease to the orbiting bearing, then sufficient grease can be supplied to the bearing, but the maintenance operation becomes complicated and time-consuming
Solution Approach 1:
The patent repositions the oil supply hole on the back side of the orbiting scroll and extends it to face the front side, creating a grease supply path that allows lubrication access without removing the fixed scroll. This dimensional change in the grease supply path enables reliable lubrication while significantly reducing maintenance time and operational complexity.
3Volume of moving object
If the oil supply hole is positioned on the front side of the orbiting scroll, then the structure is compact, but the grease nipple cannot access the opening part when the fixed scroll is attached
Solution Approach 1:
The patent positions the oil supply hole on the back side of the orbiting scroll rather than the front side, and extends it to face the front side. This creates a through-path that allows the grease nipple to access the opening part even when the fixed scroll is attached, maintaining structural compactness while improving grease supply accessibility.
Data Source
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AI summary
The objective of the present invention is to provide a scroll-type fluid machine and maintenance method for same with which reliability and workability are improved by making it possible to supply sufficient grease to necessary parts of an orbiting bearing or auxiliary crank bearing without entailing a complicated operation during maintenance. The present invention provides a scroll-type fluid machine that is provided with a fixed scroll, an orbiting scroll facing the fixed scroll and orbiting, a casing being provided on the outer side of the orbiting scroll in the radial direction, a drive shaft driving the orbiting scroll, an orbiting bearing supporting the drive shaft with respect to the orbiting scroll, and a piping supplying a lubricant to the orbiting bearing, said scroll-type fluid machine being characterized in that: the orbiting scroll is provided with a boss plate that is attached to the drive shaft; the piping is provided in the boss plate; and the tip of the piping faces toward an opening provided between the casing and the fixed scroll or toward an opening provided in the fixed scroll or the casing.