Sullivan-Palatek 15D, Руководство пользователя

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30 COMPONENT DESCRIPTION
3.5.4 SCAVENGER LINE
The scavenger line (also referred to as an oil return line) is a small diameter steel tube that picks up any oil
removed from the air by the air/oil separator. Oil picked up by the scavenger line passes through a sight glass
assembly containing an orifice sized for the compressor and a screen to filter the oil before it is injected back
into the compressor unit. The scavenger line is mounted to a tab located on the side of the tank. The tab
fully supports the weight of the assembly for reduced vibration.
3.5.5 FLUID LEVEL SIGHT GLASS AND FILL
The fluid level sight glass and fill allows visual monitoring of the oil level in the sump tank and is the port
through which oil is added. The fluid level sight glass and fill is supplied with a vented cap and is located on
the side of the sump tank behind the right end access panel door (if enclosed).
3.5.6 SUMP TANK DRAIN VALVE
The sump tank drain valve allows oil to be drained from the sump tank. It is a ball-type valve that is plumbed
to the frame for external draining. The sump tank drain valve is located under the sump tank.
3.6 COOLING AND LUbRICATING SYSTEM
The compressor oil is circulated through the package due to differential pressure between the sump tank and
the compressor unit. Oil flows from the sump tank to the temperature control valve where cool oil is initially
allowed to bypass the oil cooler, injecting directly into the compressor unit. As the temperature of the oil
rises, the temperature control valve begins to redirect the oil to the oil cooler. Once the oil temperature
matches or exceeds the temperature control valve’s set point, all of the oil will be delivered to the oil cooler.
In the oil cooler, heat from the oil is transferred to the cooler fins. Airflow produced by the electric-driven
cooling fan removes the heat from the oil cooler. Cool oil then flows through the oil filter where particulate is
removed before entering the compressor unit. Oil in the compressor unit lubricates the internal components,
cools the compressor unit by absorbing the heat of compression and seals the compressor unit’s internal
clearances.
3.6.1 LUBRICANT
The compressor lubricant is also referred to as compressor fluid or simply as oil. During the compression
cycle, lubricant is injected directly into the compressor unit. The lubricant in a rotary screw compressor
serves three primary functions.
1. It is a lubricant, supplying constant flow between the moving parts along with the bearings and seals.
2.
It is a coolant, removing the generated heat of compression during operation. The controlled
temperature rise across the unit will be around 40°F.
3. It is a sealant, sealing the rotors to reduce leakage paths between the rotors and between the stator
housing.
Rotary screw compressor units require specialized lubricant to maintain proper performance. Use of
Sullivan-Palatek lubricants is recommended. Refer to 8.4 Compressor Lubricants on page 62 .
3.6.2 TEMPERATURE CONTROL VALVE (THERMOSTATIC VALVE)
The temperature control valve (also referred to as a thermostatic valve) regulates the flow of oil to the oil
cooler based on temperature. When the compressor is first started, the valve allows cool oil to bypass the
oil cooler. As the oil temperature rises, the valve gradually redirects the hot oil through the oil cooler. The
temperature control valve is mounted to the side of the oil cooler.
3.6.3 FLUID (OIL) COOLER
The fluid (oil) cooler is a two-pass, finned aluminum tube design. The fluid (oil) cooler allows transfer of heat
from the oil through the tube wall and into the fins. The heat is then removed by the airflow from the motor-
driven cooling fan. The cooling assembly is located at the end of the compressor package and exhausts
outward (unless equipped with a vertical flow enclosure).
3.6.4 COOLING FAN AND MOTOR
The cooling fan and motor produce airflow through the fluid/air cooler to remove heat. The cooling fan is
a standard blade design. The fan is attached to the non-drive end shaft of the main drive motor within a
shroud.
3.6.5 FLUID (OIL) FILTER
The fluid (oil) filter removes particulate from the oil prior to entering the compressor unit. The fluid (oil) filter
is a full-flow, spin-on type element made of microglass media. It is mounted directly to the compressor unit.