Hydraulic system comprising pressure-controlled damping means
AssigneeEaton Fluid Power GmbH
InventorMichael Zimpfer
Life of this patent
Estimating the term…
Abstract
Hydraulic systems generally comprise expansion hose lines and other damping elements which are provided with one or several serially connected hose chambers according to the generated pressure pulsation. The damping measures of the inventive hydraulic system are initiated according to the prevailing pressure during operation thereof. The aim of the invention is to keep the loss of pressure low and save a significant amount of energy during continuous operations. Said aim is achieved by a direct line connection between the source of pressure and the user, which bypasses the dampers. Said bypass line is blocked by a valve when the pressure in the system increases.
Claims12
A pressurized fluid power transmission system, comprising:
- a pressure source;
- a load;
- and
- a damping device interposed between the pressure source and the load, the damping device including at least two channels arranged parallel to each other and having different flow resistances, the channels being controlled by a valve means that affects the flow distribution to the channels as a function of the pressure at a selected point of the power transmission system by at least partially closing the channel having a lower flow resistance in response to an increase in pressure sensed at the selected point,
- wherein at least one of the channels contains at least one pulsation damper that includes an expansion hose containing at least one resonator pipe or reflector.
A pressurized fluid power transmission system, comprising:
- a pressure source;
- a load;
- and
- a damping device interposed between the pressure source and the load, the damping device including at least two channels arranged parallel to each other and having different flow resistances, the channels being controlled by a switching valve that includes a gradual, sliding transition when switching between the channels,
- wherein the switching valve affects the flow distribution to the channels as a function of the pressure at a selected point of the power transmission system by at least partially closing the channel having a lower flow resistance in response to an increase in pressure sensed at the selected point,
- wherein each channel has one channel input respectively, and one channel output respectively, and that the channel outputs are connected with each other, and that the channel inputs are connected with each other via the switching valve.
A pressurized fluid power transmission system, comprising:
- a pressure source;
- a load;
- and
- a damping device interposed between the pressure source and the load, the damping device including at least two channels arranged parallel to each other and having different flow resistances, the channels being controlled by a valve means that affects the flow distribution to the channels as a function of the pressure at a selected point of the power transmission system by at least partially closing the channel having a lower flow resistance in response to an increase in pressure sensed at the selected point,
- wherein the valve means is connected with a fluid-activating device which actuates the valve means, the fluid-activating device containing a spring means that exhibits a non-linear force-versus-path characteristic to counteract the generated force of actuation.
A pressurized fluid power transmission system, comprising:
- a pressure source;
- a load;
- and
- a damping device arranged between the pressure source and the load, the damping device including at least two channels arranged parallel to each other, the at least two channels including a first channel and a second channel having a greater flow resistance than the first channel, wherein the second channel includes at least one pulsation damper having an expansion hose containing at least one resonator pipe or reflector,
- the channels being controlled by a valve that affects the flow distribution to the channels as a function of pressure by at least partially closing the first channel in response to an increase in pressure in the power transmission system.
Dependencies are inferred from the claim text.