SF-15/60 diesel skid-mounted direct-drive high-pressure air compressor

I. Main Technical Parameters of the Compressor

1. Medium composition: air

2. Compressor Model: SF-15/60 Diesel Skid-Mounted Compressor

3. Structural form: S-shaped, air-cooled

4. Compression stages: Three-stage compression

5. Cylinder diameter for each grade (mm): Grade 1: Φ235×4, Grade 2: Φ160×2, Grade 3: Φ80×2

6. Nominal volumetric flow rate (m³/min): 15

7. Inhalation pressure: MPa(G): Atmospheric pressure

8. Exhaust pressure: MPa(G): 6.0

9. Inhalation temperature (°C): ≤40

10. Gas supply temperature (°C): ≤70 (after post-cooling)

11. Compressor speed (r/min): 1200

12. Transmission method: Variable speed clutch connection

13. Lubrication method: Splash lubrication

14. Installation method: Skid-mounted, with operating room cover.

15. Lubricating oil consumption: 90g/h

16. Noise dB(A): ≤90

17. Power source: Yuchai YC6M 258KW 1800r/min

18. Stroke: 120mm

19. External dimensions (length × width × height) mm: Approximately 6500 × 2100 × 2300

20. Weight (kg): Approximately 6500

Supply price: 10,000

II. Compressor Main Unit

1. Crankcase components: 

  The crankcase has side covers and oil sight glasses on both sides for disassembly and inspection. The front section, which is the power connection end, is equipped with a bearing housing and a front bearing cover. The fan bracket on the upper part of the rear bearing cover supports the fan assembly. The upper part is cast with cylinder support planes at 90 degrees to each other. The larger side is equipped with the first-stage cylinder assembly, and the smaller side is equipped with the second-stage cylinder assembly. The top surface is equipped with a breather. The bottom of the crankcase is equipped with an oil pan, which contains special compressor oil.

2. Crankshaft, connecting rod and components

  The crankshaft has connecting rods mounted on its crankshaft, rolling bearings at both ends, a flywheel at the large end connected to a flexible coupling, and a pulley near the bearing at the small end to drive the cooling fan. Lubrication of the crankshaft is achieved by the oil spray from the connecting rod's oil rod onto the crankshaft and piston pins, among other components.

3. Piston assembly:

  The piston assembly consists of three stages: primary, secondary, and tertiary. The primary piston is made of cast aluminum alloy, the secondary piston is made of cast iron, and the tertiary piston is also made of cast aluminum alloy. Both primary and secondary pistons are fitted with piston rings: a flat ring at the top, a torsion ring in the middle, and an oil ring at the bottom. The oil scraper ring opening is offset from the piston pin hole by more than 60 degrees, and the openings of each piston ring are offset from each other by 120 degrees. The tertiary stage has seven flat rings.

4. Cylinder components:

  The cylinder is divided into first-stage, second-stage, and third-stage cylinder components. The cylinder head of each cylinder is cast with cooling fins to increase the heat dissipation area. The cylinder head is equipped with intake and exhaust valve components, intake and exhaust pressure cylinders, and intake and exhaust pressure caps, respectively.

5. Intake and exhaust valve components:

   The system consists of a first-stage intake valve, a first-stage exhaust valve, a second-stage intake valve, and a second-stage exhaust valve, all of which are annular valve structures. The valve seat has a spring supporting the annular valve plate, and both the valve plate and the spring are made of high-quality steel. The third stage is a combination intake and exhaust valve.

6. Cooler and fan components:

  It consists of three stages of coolers and a cooling fan. It is connected between the intake and exhaust ports of the first, second, and third stages of the compressor. It is mounted on a base by uprights. The upper part of the cooler is equipped with a safety valve, and the lower part with a drain valve. A guide cover and protective cover are installed facing the crankcase. A fan-type cooling fan is installed in the middle, and a fan bracket mounts the fan assembly onto the crankcase. The fan is driven by a crankshaft pulley at the end of the crankcase via a V-belt.

III. Compressor Control System

1. The instrument panel is equipped with first, second, and third level pressure gauges and a compressor oil temperature gauge.

2. The compressor will automatically shut down when the discharge pressure is high, triggering an alarm.

3. The compressor will automatically alarm and shut down when the oil level is low.

4. Electromagnetic sewage discharge.

5. Lubrication system: The air compressor uses splash lubrication, where oil splashes everywhere in the housing and forms an oil mist, providing good lubrication for bearings, pistons, piston rings and other moving parts.