Quinny 65040-AB manual General Description, Compression Cycle and Air Flow

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Section II - Description

•General Description

•The Compression Cycle

•Cooling System

•Lubricating Fluid System

•Moisture Separator

•Capacity Control System

•Electrical System

•Indicators

General Description

The QSD™ compressor is a two-stage, positive displacement, oil-free rotary screw unit consisting of two precision-machined rotors per stage. The male rotor of each stage are turned by a set of precision timing gears which are driven by the motor through a flexible drop-out type coupling. Both rotors (of each stage) are housed in a single cast iron cylinder with water jackets surrounding them.

All models are equipped with a positive displacement fluid pump mounted to the gearbox to circulate fluid through the bearing system and to the gear mesh. The fluid cooler, fluid pressure relief valve, and fluid filter are also mounted on the gearbox.

All components are attached to a heavy-duty steel frame. Controls and indicators are arranged on a control panel. An acoustical cabinet is included to reduce machine sound levels.

The Compression Cycle and Air Flow

The compression cycle of the two-stage QSD™ rotary compressor is a continuous process from the intake of stage one to the discharge of stage two. Each stage consists of two rotors in constant mesh, housed in a cylinder with two parallel adjoining bores. Each male rotor has lobes that mesh with flutes in the female rotor. The rotors are synchronized via AGMA12 timing gears. All parts are machined to exacting tolerances.

As the rotors of stage one rotate, air is drawn into the cylinder through the inlet port located immediately after the air cleaner connection. A volume of air is trapped as the rotor lobes pass the inlet cut off points in the cylinders. Compression occurs as the male rotor rolls into the female flute, progressively reducing the space, thereby raising the pressure.

Compression continues until the lobe and flute pass the discharge port. The compressed air is then discharged into the intercooler. The air then flows through a moisture separator/trap assembly to remove condensate from the cooling process. From there the air flows to the inlet of stage two. Air inlet pressure at the stage two inlet should be between 30 to 36 psig.

In stage two, the above compression process is repeated. Discharge air pressure from stage two will be the requested system pressure. From stage two the compressed air travels through an aftercooler and a second moisture separator/trap assembly. The compressed air passes through a minimum pressure check valve and into the compressed air distribution system.

Quincy Compressor® - QSD™

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Contents QSD Series Page Table of Contents Section V Maintenance or Service Preparation Standard Warranty Dimensional Data air-cooled Dimensional Data water-cooled Section I General Safety PrecautionsSpare Parts Ordering Information Safety Alert SymbolsSection II Description Compression Cycle and Air Flow General DescriptionWater-cooled Cooling SystemLubricating Fluid System Moisture SeparatorCapacity Control System Electrical System Shutdown Conditions Back-up ControlHigh Discharge Air Temperature Lights IndicatorsSafety Sensors Main Power on LightSection II Description Location Section III InstallationMoving the Unit to the Installation Site ReceivingPiping Connections Piping Fit-up Manual Shutoff ValveGuards ElectricalWater Quality Water FlowFan Rotation Fluid LevelStopping the Compressor Normal Operation Section IV Operating ProceduresPrior to Starting Starting the CompressorStopping the Compressor Emergency Temperature Readings Water-cooledPressure Readings Section V Preparing for Maintenance or Service This page Intentionally Left Blank Section VI Servicing SafetyFluid Specifications Fluid Life Air FilterInput Shaft Seal Preparation for New Seal InstallationAirend Sealing System Seal InstallationAdjusting Pressure Switch Section VII Service AdjustmentsPressure Switch Pressure Switch Back-up Operating ModeThis page Intentionally Left Blank Do not switch modes with power on the compressor Section Viii Power$ync II OperationIntroduction to Power$ync Back-up Mode OperationContinuous Run Multiple Machine Operational ModeAuto Dual Time Delay Single Machine Operational ModesNetwork Load Delay Time Pressure SettingsConnecting Cable to the Power$ync II Circuit Board Network InstallationRocker Switch Settings UP/DOWN DEADBAND, F1 EDIT, Enter Return Network Voltage Tests on Power$ync II SystemsNetwork Setup Start-up Power-up DisplaysSection Viii Power$ync II Operation U19 Memory Failure Contact Your Service Representative Compressor in Back-up ModeU19 Data not Initialized Press F2 to Initialize Deadband Data Error Press F1 to ClearU19 Data Checksum Error Press F2 to Update Filter Needs Servicing Please Replace AS Soon AS Possible Compressor is Starting Start-up DisplaysOperational Displays Additional SensorsProgrammed Shutdown Compressor is Unloaded Minutes Left to ShutdownCompressor is Unloaded Press F2 Compressor Settings and Maintenance DisplaysMode and Pressure Displays Compressor Mode of Operation Auto Dual Timed Stop Press F1Press F1 to change the load and unload pressures Read Pressure Settings pages 34-35 beforeMachine ID for this Compressor Press Enter to Accept Value Machine ID SetupPlease Wait Network Configuration in Progress UP/DOWN Machine ID, Enter Return Before setting or changing a sequence, readSequence Network Data UP/DOWN POSITION, F1 EDIT, Enter ReturnDAY Monday SEQ Network Configuration MenuDAY Monday SEQ Abcd To clear a particular sequence from the memory, press F1 Intake Filter Hours Filter Service HourmetersReset Service Hourmeters Compressor Hourmeter Menu Compressor HourmetersFluid Hours Reset to Press Enter to Return Press F1 to Reset Fluid Filter Hours Press Enter to ReturnFluid Filter Hours Reset to Press Enter to Return Press F1 to Reset Fluid Hours Press Enter to ReturnTime and Date Menu Current Time on this Control Compressor Maintenance Menu Compressor Control TestTime Menu To View Current Time To SET Time and DateFluid Press HorsepowerCompressor Control Test Menu Unload Valve Test Press F1 Unload PressNetwork Diagnostic Unit Configuration DateModem Baud Rate Setup Compressor Diagnostic Menu View Shutdown LOGSection Viii Power$ync II Operation ETOL00 FTOL00 Network Connection Data Confidence F1 to EDIT/ENTER to Accept Value Indicator is lit, the indicator will remain litModem INITIALIZATION** Init Compressor has Shut Down Emergency Stop Button WAS Pressed Sequence Data Error Press F1 to Clear Schedule Data Error Compressor has Shut Down Take Corrective Action Back-up Mode until all faults have been corrected Inlet Temp Fluid Pressure STG 1 OUT Temp STG 2 in Temp Emergency Stop Pressed Shutdown Log MessagesMotor Overload STG 2 Discharge RTD Failure Control log has no entries at that point Probable Causes Corrective Action Failure to Start Section IX TroubleshootingUnscheduled Shutdown Section IX TroubleshootingProbable Causes Corrective Action Unscheduled Shutdown Frequent Fluid Filter Clogging Frequent Air Cleaner CloggingHigh Discharge Air Temperature Probable Causes Corrective Action Low Air DeliveryCompressor does not Unload when there is no Air Demand Too Rapid Cycling Between Load and Unload Excessive Fluid in Gearbox Vent Bowl Pressure Relief Valve ExhaustingExcessive Fluid in Buffing Air Vent Bowls Water in Buffing Air Vent BowlsHigh Interstage Pressure Low Delivery PressureMicroprocessor Will Not Display Messages Erroneous DisplaysInterval Action Section X- Maintenance ScheduleDaily Operating Record Quincy Compressor QSD Quincy Compressor QSD
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