The oil fed to the crankshaft connects through drilled passages to the connecting rods and then to the piston pins. The main bearing receives oil from a %4-in. pipe that links to This Big New Food Market and Terminal at Kansas City, Kan., which produces 160 tons of ice daily using three Frick four-cylinder compressors and one large two-cylinder machine. The Missouri Athletic Association used two Frick four-cylinder machines for air conditioning its building in St. Louis. A smaller pipe connects the front main bearing to the stuffing box with a pressure gauge and an oil check valve set at 40 Ib. above crankcase pressure, allowing excess oil to return to the crankcase. The remaining oil lubricates cylinder walls via a Madison-Kipp 9-point lubricator and supplies oil for valves through a line to the compressor suction. A chain oiler lubricates the outboard bearing from an oil reservoir in the pedestal. Frick refrigerating machine oil No. 4 is recommended.
The suction manifold, made of welded steel pipe with flanges, connects branches to each cylinder, featuring a built-in main suction stop valve and a removable suction screen for cleaning. The discharge manifold includes a 2-inch safety relief valve and bypass connection for the engineer's convenience. Main stop valves use Frick’s patented high-angle seat design.
Principal dimensions of large Frick four-cylinder compressors are provided, including cylinder size, main connections, jacket cooling water connections, shaft diameters, bypass connections, suction screen lengths, and various critical dimensions A through J. Dimensions given should not be used for construction purposes but provide reference information on the compressor's design.
<Callout type="important" title="Critical Valve Design">The high-angle seat valve design by Frick is highlighted as superior in holding gas pressure compared to other types.</Callout>
Details of Frick branch offices and sales representatives across various cities are listed, along with overseas distributors.
Key Takeaways
- Frick four-cylinder compressors require precise oil management for optimal performance and longevity.
- The suction manifold design includes critical components like a removable screen for easy maintenance.
- High-angle seat stop valves are recommended for their superior gas pressure holding capabilities.
Practical Tips
- Regularly check the oil level in the crankcase to ensure proper lubrication of all moving parts.
- Clean the suction screen regularly to prevent blockages and maintain efficient refrigerant flow.
Warnings & Risks
- Exceeding the set pressure on the oil check valve can lead to excessive oil returning to the crankcase, causing operational issues.
- Using incorrect oil types or weights can damage compressor components over time.
Modern Application
While this chapter focuses on specific mechanical details of early 20th-century refrigeration compressors, its principles of lubrication and maintenance are still relevant today. Understanding these historical techniques provides a foundation for modern refrigeration system upkeep, emphasizing the importance of proper oil management and regular inspections.
Frequently Asked Questions
Q: What is the recommended oil type for Frick four-cylinder compressors?
Frick refrigerating machine oil No. 4 (the heaviest weight) is specifically recommended for use in these compressors.
Q: How does the suction manifold design ensure efficient maintenance and operation of the compressor?
The suction manifold includes a built-in main suction stop valve and a removable suction screen, allowing easy cleaning to prevent blockages and maintain optimal refrigerant flow.
Q: What is the significance of the high-angle seat valve design mentioned in this chapter?
Frick’s patented high-angle seat valve design is highlighted for its superior ability to hold gas pressure compared to other types, ensuring more reliable operation and reduced risk of leaks or failures.