Pressure supply circuit with variable pumps
n Pressure supply circuit with variable pumps Variant of a central hydraulic oil supply in which the pressure in the manifold is only applied by variable pumps that are equipped with pressure controllers [...] necessary for the pumps is based on the sum of the individual requirements of the loads operated simultaneously (Figure D 69) . Figure D 69: Pressure supply circuit with variable pumps
Electromechanical displacement control of pumps/ motors
Fluidlexikon Electromechanical displacement control of pumps/ motors Actuation of the adjustment equipment in a pump/ motor by an electric motor. Permits in general adjustment speeds that are not very
Axial gap compensation on gear pumps (so-called gap compensation)
Fluidlexikon Axial gap compensation on gear pumps (so-called gap compensation) Gear pumps have two sliding-contact areas (sealing areas): at the periphery as well as the two sides of the gear wheels, i
Valve-controlled pumps
Fluidlexikon Valve-controlled pumps Piston pumps, in which the flow rate is pressure-controlled by suction and pressure valves . Here the suction valve opens when facing a weak spring force as soon as [...] pressure valve is opened when facing the system pressure acting on it ( Figure V 7 ). Valve-controlled pumps are used in only small oil hydraulic systems but are standard in water hydraulic systems . As the
Valve plate-controlled pumps
Valve plate-controlled pumps Pumps in which the flow rate is controlled by a slit in fixed spigots ( radial piston pumps ) or axial ( axial piston pumps ) or radial ( vane pumps ) in control discs. In [...] In principle, they are also suitable for use as hydraulic motors . Opposite: Valve-controlled pumps.
Switching methods for hydraulic pumps
Fluidlexikon Switching methods for hydraulic pumps Considerations on switching methods for hydraulic pumps are necessary if several pumps are used in a hydraulic system . A distinction is then made between [...] output pressure at pump 2 (e.g. in the case of some internal gear pumps to reach 300 bar). Figure S 17: Switching methods for hydraulic pumps [...] two-circuit or multi-circuit switches : Each pump supplies its own circuit. Parallel circuit : Several pumps work together for a single consumer. This may be caused by a fixed circuit connection or temporary
Hydraulic pump
displacement principles such as gear pumps with subcategories, vane pumps with subcategories, piston pumps, with subcategories Construction forms of hydraulic pumps [...] the hydraulic energy back into mechanical energy. Hydraulic pumps are mostly driven by electric drives or combustion engines. Hydraulic pumps can be classified according to various aspects: Acted on from [...] energy (torque M, rotation speed n) into hydraulic energy (flow rate Q, pressure p). Displacement pumps are used in hydrostatic applications for this purpose. A flow rate emerges at the pressure connection
Digital pump
constant pumps comprising n individual pumps that are geometrically tiered such that 2n—1 delivery flow steps are obtained. By enabling and disabling (unpressurised idle circulation) individual pumps the overall [...] overall pump delivery flow can be adjusted to demand. Digital pumps are only used infrequently these days. Instead the easier to use but also more expensive variable pump is used with a delivery flow that
Pump drive
movements is provided directly from pumps (without a storage facility). If different speeds are required, constant pumps are used in throttle control and variable pumps in pump controls .
Flow machines
term for pumps and devices, which work according to the hydrodynamic principle, i.e. in which the velocity element of the flowing fluid is decisive. For pumps, these are the centrifugal pumps and the turbines