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Auxiliary Components. Electrical ControlsFilters and StrainersFittingsHeat ExchangersHydraulic FluidsInstrumentationManifoldsLinesReservoirs. Auxiliary Components. Reservoirs
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1. Auxiliary Components
BAE 515 Lecture 15
2. Auxiliary Components Electrical Controls
Filters and Strainers
Fittings
Heat Exchangers
Hydraulic Fluids
Instrumentation
Manifolds
Lines
Reservoirs
3. Auxiliary Components Reservoirs Well designed reservoirs store fluid, trap contaminants, separate entrained air, and cools fluid
Three classes:
Integral Wasted space within machines is converted to reservoir
Remote Used in stationary or industrial applications where space is not a concern
Rectangular Used as a base to support motor and pump, or other components.
4. Auxiliary Components
Design Criteria:
Volume Capacity is typically between and two and three times the pump output capacity for 1 minute, reservoir must have capacity to accept flow from retracted cylinders, and to fill extended cylinders.
Lines Return line and pump inlets should be submerged, pump supply should be 1.5 diameters from bottom of reservoir to avoid ingestion of contaminants resting on the bottom of the tank, tank should de-aerate fluid by providing enough separation time in the reservoir, screens may be added (No. 100 mesh on a 300 to 450 angle) to remove entrained air
Baffles Pump inlet should be separated from return lines to prevent continuous circulation of the same fluid, two baffles provide 1.5 times flow path of single baffles.
Cleaning provisions should be provided to clean reservoirs.
5. Auxiliary Components
Design Criteria:
Draining Provisions should be provided for easily draining reservoirs.
Level Indicator Site gauges should be provided for visual monitoring of fluid levels.
Sealing cast reservoir components should be sealed to prevent contamination of fluids
Filters/Breathers As fluid levels rise and fall in the reservoir provisions should be made to filter potential contaminants from entering air.
Pressurizing Reservoirs may be pressurized to provide a flooded pump inlet to avoid cavitation, a relief should be added to prevent over-pressurization
6. Auxiliary Components
Design Criteria:
Filters Access Pump inlet filters should be serviced without drain reservoir or diving external filters can be serviced easily.
Plugs/Separators Magnetic plugs and separators can be used to reduce ferrous contaminants, plugs should be placed in locations where fluid velocities are low.
Filler Filler opening should be located in an easy to reach location, opening should be fitted with a screen to reduce contamination.
Scavenger systems If overhead tanks are used, pumps must be provided to return drainage fluid to main reservoir.
7. Auxiliary Components